1Samuel Eldar, Hava T, Siegelmann, et al. Conversion of laparoscopic cholecystectomy to open chlecystectomy in acute cholecystitis:Artifial Neural Netwoks improve the prediction of conversion[J]. World J Surg, 2002; 26: 79 - 85.
2Habib FA, Kolachalam RB, Mittal VK, et al. Role of laparoscopic cholecystectomy in the management of gangrenous cholecystitis[J]. Am J Surg,2001; 181:71 - 75.
3Madan AK,Tesi D,Flint LM,et al. How early is early laparoscopic treatment of acute cholecystitis [J] ? Am J Surg,2002; 183:232- 236.
4Kenny PK, Richard CT, Levil D, et al. Laparoscopic cholcystectomy in acute cholecystitis[J]. Arch Surg, 1996; 131:540- 546.
5Santamborgio R, Montorsi M, Bianchi P, et al. Technical difficulties and complications during laparoscopic cholecystectomy: predictive use of preoperative ultrasonography[ J ]. World J Surg, 1996; 20: 978 - 981.
6Kama NA, Kologlu M, Doganay M, et al. A risk score for conversion from laparoscopic to open cholecystectomy. Am J Surg,2001,181:520-525.
7Brunt LM, Quasebarth MA, Dunnegan DL,et al. Outcomes analysis of laparoscopic cholecystectomy in the extremely elderly. Surg Endosc,2001,15:700-705.
8Bedirli A,Sozuer EM, Yuksel O, et al. Laparoscopic cholecystectomy for symptomatic gallstones in diabetic patients. J Laparoendosc Adv Surg Tech A,2001,11:281-284.
9Alponat A, Kum CK, Koh BC, et al. Predictive factors for conversion of laparoscopic cholecystectomy. World J Surg,1997,21:629-633.
10Daradkeh SS, Suwan Z,Abu-Khalaf M,et al.Preoperative ultrasonography and prediction of technical difficulty during laparoscopic cholecystectomy.World J Surg,1998,22:75-77.