1Velanovich V, Satava R. Balancing the normal appendectomy rate with the perforated appendicitis rate: implications for quality assurance. Am Surg, 1992,58: 264-269.
2Gilmour IEW, Lowdon AGR. Acute appendicitis. Edib Bed J,1952, 59:361-373.
3Heafield R, Roe AM, Watkins R, et al. Outcome of emergency surgical admissions for non-specific abdominal pain. Gut, 1990, 31:Al167.