RT Journal Article SR Electronic T1 HMO BLUES JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 349 OP 349 DO 10.3122/jabfm.16.4.349 VO 16 IS 4 A1 Sabrina Echols-Elliott YR 2003 UL http://www.jabfm.org/content/16/4/349.abstract AB