RT Journal Article SR Electronic JF The Journal of the American Board of Family Medicine JO J Am Board Fam Med FD American Board of Family Medicine SP 431 OP 431 DO 10.3122/jabfm.19.4.431 VO 19 IS 4 A1 Peter S. Millard YR 2006 UL http://www.jabfm.org/content/19/4/431.1.abstract AB