RT Journal Article SR Electronic T1 Bedside Cardiology. Fourth edition JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 541 OP 541 DO 10.3122/jabfm.7.6.541a VO 7 IS 6 A1 Maier, Russell YR 1994 UL http://www.jabfm.org/content/7/6/541.1.abstract AB