【作者(必填)】Control Clin Trials. 1993 Apr;14(2 Suppl):52S-67S.
Monitoring recruitment effectiveness and cost in a clinical trial.Bjornson-Benson WM, Stibolt TB, Manske KA, Zavela KJ, Youtsey DJ, Buist AS.
SourceDepartment of Physiology, Oregon Health Sciences University, Portland 97201.



【全文链接或数据库名称(选填)】http://www.ncbi.nlm.nih.gov/pubmed/8500313