1. Primary care physicians should be coordinators, not gatekeepers;Bodenheimer;JAMA,1999
2. Differences in resource use and costs of primary care in a large HMO according to physician specialty;Selby;Health Serv Res,1999
3. The influence of gatekeeping and utilization review on patient satisfaction;Kerr;J Gen Intern Med,1999
4. Training pediatricians for the evolving generalist-specialist interface in the managed care era;Williams;Pediatrics,1998
5. Current estimates from the National Health Interview Survey, 1995;Benson;Vital Health Stat,1998