the locations of the gallstones in patients undergoing early versus delayed operations were , respectively : 97 % and 100 % in gallbladder , 75 % and 28 % within common or hepatic ducts ( p < 0.02 ) , and 31 % and 0 % free in duodenum ( p < 0.01 ) .
C0008350
gallstones
C0016976
gallbladder