%0 Journal Article
%T Design and methodological considerations in the National Cooperative Gallstone Study: a multicenter clinical trial.
%A Lachin, J M
%A Marks, J W
%A Schoenfield, L J
%A Tyor, M P
%A Bennett, P H
%A Grundy, S M
%A Hardison, W G
%A Shaw, L W
%A Thistle, J L
%A Vlahcevic, Z R
%J Controlled clinical trials
%V 2
%N 3
%P 177-229
%@ 0197-2456
%D 1982-04-12
%~ DeepDyve