References
- McCarthy EG, Widmer GW: Effects of screening by consultants on recommended elective surgical procedures. N Engl J Med 291:1331–1335, 19 Dec 1974
- Dyck FJ, Murphy FA, Murphy JK, et al: Effect of surveillance on the number of hysterectomies in the province of Saskatchewan. N Engl J Med 296:1326–1328, 9 Jun 1977
- Office Visits to General Surgeons: National Ambulatory Medical Care Survey, United States, 1975. Advance Data From Vital and Health Statistics, National Center for Health Statistics, Hyattsville, Md, 24 Mar 1978