scholarly journals Unexpected difficulties in randomizing patients in a surgical trial: A prospective study comparing extracorporeal shock wave lithotripsy with open cholecystectomy

1994 ◽  
Vol 18 (5) ◽  
pp. 769-772 ◽  
Author(s):  
P. W. Plaisier ◽  
M. Y. Berger ◽  
R. L. van der Hul ◽  
H. G. T. Nijs ◽  
R. den Toom ◽  
...  
1990 ◽  
Vol 144 (1) ◽  
pp. 15-16 ◽  
Author(s):  
Henrik Westh ◽  
Freddy Knudsen ◽  
Anne-Margrete Hedengran ◽  
Merete Weischer ◽  
Peter Mogensen ◽  
...  

2009 ◽  
Vol 38 (2) ◽  
pp. 135-142 ◽  
Author(s):  
Sepehr Salem ◽  
Abdolrasoul Mehrsai ◽  
Hamed Zartab ◽  
Nematollah Shahdadi ◽  
Gholamreza Pourmand

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