Regional variation in the utilization of carotid endarterectomy

Small Area Variations in Health Care Delivery

John E. Wennberg, Alan M. Gittelsohn · Science · 1973 · 1.9K citations

Health Insurance Reform, Public Policy, Primary Care +15

Distribution and correlates of sonographically detected carotid artery disease in the Cardiovascular Health Study. The CHS Collaborative Research Group.

Daniel H. O’Leary, Joseph F. Polak, Richard A. Kronmal et al. · Stroke · 1992 · 844 citations · Full text

Unwarranted variations in healthcare delivery: implications for academic medical centres

John E. Wennberg · BMJ · 2002 · 787 citations · Full text

Health Administration, Practice Management, Clinical Specialties +22

Ethnic and Socioeconomic Differences in Cardiovascular Disease Risk Factors

Marilyn A. Winkleby, Helena C. Kraemer, David K. Ahn et al. · JAMA · 1998 · 560 citations

Racial Variation in the Use of Coronary-Revascularization Procedures — Are the Differences Real? Do They Matter?

Eric D. Peterson, Linda K. Shaw, Elizabeth R. DeLong et al. · New England Journal of Medicine · 1997 · 552 citations · Full text