RT Journal Article SR Electronic T1 A Short History of Primary Care Practice-based Research Networks: From Concept to Essential Research Laboratories JF The Journal of the American Board of Family Medicine JO J Am Board Fam Med FD American Board of Family Medicine SP 1 OP 10 DO 10.3122/jabfm.19.1.1 VO 19 IS 1 A1 Green, Larry A. A1 Hickner, John YR 2006 UL http://www.jabfm.org/content/19/1/1.abstract AB