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

作者信息

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

出版信息

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

DOI:10.1016/0197-2456(81)90012-x

PMID:7326939

Abstract

摘要

相似文献

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

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