RT Journal Article SR Electronic T1 The Last Call JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 537 OP 539 DO 10.3122/jabfm.5.5.537 VO 5 IS 5 A1 Loxterkamp, David YR 1992 UL http://www.jabfm.org/content/5/5/537.abstract AB