title: Primary care practice-based research networks active in North America.
authors.affiliation: Ambulatory Sentinel Practice Network, Denver, CO 80220.
authors.forename: L
authors.initials: L
authors.lastname: Niebauer
authors.forename: P A
authors.initials: PA
authors.lastname: Nutting
mesh_terms: D006302:Health Services Research / Q000458:organization & administration*; D009656:North America; D011320:Primary Health Care