Validation of Data Collection for the HEDIS Performance Measure on Chlamydia Screening in an MCO

Feifei Wei, PhD; Cathleen M. Walsh, DrPH, MSPH

Improvements in Access to Care for HIV and AIDS in a Statewide Medicaid Managed Care System

James E. Bailey, MD, MPH; David L. Van Brunt, PhD; Stephen P. Raffanti, MD; Wendy J. Long, MD, MPH; and Patrick H. Jenkins, MPH

Effects of Protocol-Driven Care Versus Usual Outpatient Clinic Care on Survival Rates in Patients With Type 2 Diabetes

Wing Yee So, MRCP; Peter C. Y. Tong, PhD; Gary T. C. Ko, FRCPI; Wilson Y. S. Leung, BPharm; Chun-Chung Chow, FRCP; Vincent T. F. Yeung, MD; Wing-Bun Chan, MRCP; Julian A.J.H. Critchley, PhDâ? ; Clive S. Cockram, MD; and Juliana C. N. Chan, MD

The Effect of HMO Competition on Gatekeeping, Usual Source of Care, and Evaluations of Physician Thoroughness

Andrew R. Sommers, MS, MA; Douglas R. Wholey, PhD

The Public's Opinions of Physicians: Do Perceived Choice and Exercised Choice Matter?

Ming Tai-Seale, PhD, MPH; Bernice Pescosolido, PhD