RT Journal Article SR Electronic T1 African Family Medicine JF The Journal of the American Board of Family Medicine JO J Am Board Fam Med FD American Board of Family Medicine SP 169 OP 170 DO 10.3122/jabfm.2008.02.070238 VO 21 IS 2 A1 Downing, Raymond YR 2008 UL http://www.jabfm.org/content/21/2/169.abstract AB