One hundred and seventy eight patients with EHBD stones were randomized into 4 groups : laparoscopic cholecystectomy ( LC ) and laparoscopic common bile duct exploration ( LCBDE ) plus T-tube drainage ( group LT ) , LC and LCBDE with endonasobiliary drainage ( ENBD ) tube ( group LE ) , and endoscopic sphincterotomy with ENBD followed by LC ( group EE ) and T-tube drainage of open CBDE ( group OT ) .