RT Journal
A1 Singh VK, Khashab MA, Okolo PI, III, Kalloo AN
T1 ERcp or laparoscopic exploration for the treatment of suspected choledocholithiasis?
JF Archives of Surgery
JO Archives of Surgery
YR 2010
FD August 1
VO 145
IS 8
SP 796
OP 796
DO 10.1001/archsurg.2010.128
UL http://dx.doi.org/10.1001/archsurg.2010.128
AB 
While the primary outcome of the study was bile duct stone clearance, the sample size was not calculated a priori. Although a nonsignificant bile duct stone clearance rate difference of 10% was seen between the ERCP and LCBDE arms of the study, the study could have been underpowered to detect a significant difference.