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Geographic Information Systems to Assess External Validity in Randomized Trials. 期刊论文
American Journal of Preventive Medicine, 2017, 卷号: Vol.53 No.2, 页码: 252-259
作者:  Sloop,JosephB.;  JasonClodfelter,K.;  Savoca,MargaretR.;  Bollhalter,LindaY.;  Ludwig,DavidA.
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