2Anderson J,Luchtefeld M,Dujovny N,et al.A comparison of laparoscopic,hand-assist and open sigmoid resection in the treatment of diverticulare disease[J].Am J Surg,2007,193(3):400.
3Tekkis PP,Senagore A.I,Delaney CP,et al.Evaluation of the learning curve in laparoscopic colorectal surgery comparison of right-sided and left-sided resections[J].Ann Surg,2005,242(1):83.
