海量图书期刊资源，随时随地畅享阅读乐趣
Substituting Proxy Ratings for Patient Ratings in Cancer Clinical Trials: An Analysis Based on a Southwest Oncology Group Trial in Patients with Brain MetastasesC. M. Moinpour, B. Lyons, S. P. Schmidt, K. Chansky and R. A. Patchell · Quality of Life Research · 2000