9Allemann P,Probst H, Demartines N, et al. Prevention of in- fectious complications after laparoscopic appendectomy for complicated acute appendicitis the role of routine abdominal drainage[J]. Langenbecks Arch Surg, 2011,369 (1) : 63-68.
10Bingham GM, Zuckerman R, Finlayson SR. Perforated appen- dicitis among rural and urban patients: implications of access to care[J]. AnnSurg,2011,253(3):534-5538.