Yan, Lijing L.
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机构:
Northwestern Univ, Dept Prevent Med, Chicago, IL 60611 USA
George Inst Int Hlth, Div Res & Dev, Beijing, Peoples R China
Peking Univ, Clin Res Inst, Beijing 100871, Peoples R China
Peking Univ, Hlth Econ & Management Inst, Beijing 100871, Peoples R China Univ Chicago, Dept Hlth Studies, Chicago, IL 60637 USA