RT Journal Article SR Electronic T1 Books Received JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 479 OP 480 DO 10.3122/jabfm.4.6.479a VO 4 IS 6 YR 1991 UL http://www.jabfm.org/content/4/6/479.2.abstract AB