1 Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China.
2 Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA.
3 Department of Pharmacy Administration and Clinical Pharmacy, School of Pharmaceutical Sciences, Peking University, Beijing, China. guanxiaodong@pku.edu.cn.
4 International Research Centre for Medicinal Administration, Peking University, Beijing, China. guanxiaodong@pku.edu.cn.