1. Clinical policy: critical issues in the evaluation and management of emergency department patients with suspected appendicitis;Howell;Ann Emerg Med,2010
2. Principles of surgery;Schwartz,1989
3. Radiology of acute appendicitis;Shimkin;AJR Am J Roentgenol,1978
4. Policy implications of the computed tomography (CT) scanner,1978
5. Health Care Financing Administration. 42 CFR Parts 405 and 415 [BPD-2-P] RIN 0938-AE91: Medicare program; fee schedule for physicians’ services;Fed Reg,1991