2Pedersen AG,Petersen OB,Wara P.Randomized clinical trial of laparoscopic versus open ppendicectomy[J].Brit J Surg,2001,88:200-205.
3Long FH,Michael P,Bannon MP,et al.A prospective randomized comparison of laparoscopic appendeclomy with open appendectomy:Clinical and economic analyses[J].Surgery,2001,129:390-399.
4Hellberg A, Rudberg C,Enochsson L.Conversion from Laparoscopic to Open Appendicectomy:A Possible Drawback of the Laparoscopic Technique[J].Eur J Surg,2001,167:209-213.
5Olsen JB,Mayren CJ,Haahr PE,Randomized study of thevalue Of Laparoscopy before appendicectomy[J].Br J Sung,1993,80:922-923.
