2Bessa SS, Abdel-Razek AH, Sharaan MA, et al.Laparoscopic cholecystectomy in cirrhotics: a prospective randomized study comparing the conventional diathermy and the harmonic scalpel for gallbladder dissection[J].J Laparoendosc Adv Surg Tech A, 2011,21( 1 ) : 1-5.