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Clinical Trial
. 1981 Sep;2(3):177-229.
doi: 10.1016/0197-2456(81)90012-x.

Design and methodological considerations in the National Cooperative Gallstone Study: a multicenter clinical trial

J M Lachin, J W Marks, L J Schoenfield, M P Tyor, P H Bennett, S M Grundy, W G Hardison, L W Shaw, J L Thistle, Z R Vlahcevic
Clinical Trial

Design and methodological considerations in the National Cooperative Gallstone Study: a multicenter clinical trial

J M Lachin et al. Control Clin Trials. 1981 Sep.
No abstract available

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