Unexpected difficulties in randomizing patients in a surgical trial: A prospective study comparing extracorporeal shock wave lithotripsy with open cholecystectomy
1990 ◽
Vol 144
(1)
◽
pp. 15-16
◽
2019 ◽
Vol 43
(8)
◽
pp. 425-430
1991 ◽
Vol 146
(3)
◽
pp. 728-732
◽
2006 ◽
Vol 41
(3)
◽
pp. 338-342
◽