6Rettenbacher T,Hollerweger A,Gritzmann N,et al.Appendicitis:Should diagnostic imagining be performed if the clinical presentation is highly suggestive of the disease? Gastroenterology,2002,123:992-998.
7Whelan RL,Franklin M,Holubar SD,et al.Postoperative cell mediated immune response is better preserved after laparoscopic vs open colorectal resection in human.Surg Endosc,2003,17:972.