1. Department of Pharmacy; Peking University Third Hospital; Beijing China
2. Department of Epidemiology, Richard M. Fairbanks School of Public Health; Indiana University; Indianapolis USA
3. Center for Pharmacoepidemiology, Richard M. Fairbanks School of Public Health; Indiana University; Indianapolis USA
4. Department of Pharmacy; Beijing Friendship Hospital, Capital Medical University; Beijing China
5. Division of Nephrology; Sidney Kimmel Medical College at Thomas Jefferson University; Philadelphia Pennsylvania USA
6. Hebrew Seniorlife Institute for Aging Research and Harvard Medical School; Boston Massachusetts USA
7. Department of Pharmacy Administration and Clinical Pharmacy; Peking University Health Science Center; Beijing China