%0 Journal Article %A James W. Feimster %A John D. Mellinger %T Endoscopic Services in the United States: By Whom, for What, and Why? %D 2019 %R 10.3122/jabfm.2019.04.190192 %J The Journal of the American Board of Family Medicine %P 454-456 %V 32 %N 4 %U https://www.jabfm.org/content/jabfp/32/4/454.full.pdf