1. A randomized study of cholecystectomy with and without drainage;Trowbridge;Surg Gynecol Obstet,1982
2. Drains and antibiotics perioperatively for elective cholecystectomy;Mittelman;Surg Gynecol Obstet,1982
3. A prospective randomized study of drained and undrained cholecystectomies;Locker;Ann Surg,1983
4. Drainage following cholecystectomy;Williams;Br J Surg,1972
5. Routine versus selective drainage of the gallbladder bed after cholecystectpmy;Johnson;Am J Surg,1981