4Squadrone V, Coha M, Cerutti E, et al. Continuous Positive Airway Pressure for Treatment of Postoperative Hypoxemia[ J ]. JAMA, 2005, 293(3):589-595.
5Von Strauss, Torney M, Dell Kuster S, et al. The Cost of Surgical Training: Analysis of Operative Time for Laparo- scopic Cholecystectomy[ J ]. Surg Endosc,20i2,26(9):2579- 2586.
6Ghad G. Ball, Henry A. Pitt,Molly E. et al.#Departments of Surgeny[R]. Indiana University, Indianapolis, IN, USA, Uni- versity of Calgary,Calgary,Canada HBP,2010:465-471.
