Advancing the Patient EXperience (APEX) in COPD Registry: Study Design and Strengths

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).

the University of Minnesota, Minneapolis, MN (BPY); COPD Foundation, Washington DC (BPY); Observational and Pragmatic Research Institute, Singapore, Singapore (AK, JWHK, DBP); 4Family Physician Airways Group of Canada, Stouffville, Canada (AK); University of Toronto, Toronto, Canada (AK); DARTNet Institute, Aurora, CO (WDP, CF, GGa, ZKP, ARR); University of Colorado, Denver, CO (WDP); General Practitioners Research Institute, Groningen, Netherlands (JWHK); Optimum Patient Care, Cambridge, UK (LB, VAC, CLE, MK, CELL, CP, BS, DBP); College of Medicine, University of Florida, Gainesville, FL (KLC); University at Buffalo, Buffalo, NY (CF); Boehringer Ingelheim, Ridgefield, CT (GGo, CDM, AS); University of Michigan, Ann Arbor, MI (MKH); Department of Medicine, National Jewish Health, Denver, CO (BM); Thomas Jefferson University, Jenkintown, PA (NS); Abington Jefferson Health, Jenkintown, PA (NS); Centre of Academic Primary Care, Division of Applied Health Sciences, University of Aberdeen, Aberdeen, UK (DBP).