?:authorAffiliation
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[\'Department of Economics, University of Birmingham, Birmingham, B15 2TT, UK.\', \'Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Haidian District, No. 38, Xueyuan Road, Beijing, 100191, China.\', \'Center for Primary Care and Outcomes Research, School of Medicine, Center for Health Policy, Freeman Spogli Institute for International Studies, Stanford University, 450 Jane Stanford Way, Stanford, CA, 94305-2004, USA.\', \'Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Haidian District, No. 38, Xueyuan Road, Beijing, 100191, China. jueliu@bjmu.edu.cn.\', \'Institute for Global Health and Development, Peking University, No. 5 Yiheyuan Road, Haidian, Beijing, 100871, China. jueliu@bjmu.edu.cn.\', \'National Health Commission Key Laboratory of Reproductive Health, Peking University, No. 38, Xueyuan Road, Haidian, Beijing, 100191, China. jueliu@bjmu.edu.cn.\']
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