1. Peking University First Hospital, Beijing, China,
2. Pharmaceutical Outcomes and Policy, College of Pharmacy, University of Florida, FL, USA,
3. Tongzhou Maternal and Child Health Hospital of Beijing, Beijing, China,
4. Peking University Third Hospital, Beijing, China,
5. General Hospital of Beijing Military Region, Beijing, China,
6. Center Hospital of Aviation Industry, Beijing, China,
7. Pinggu Maternal and Child Health Hospital of Beijing, Beijing, China,
8. Beijing Hospital of Miyun City, Beijing, China,
9. Navy General Hospital, Beijing, China,
10. Beijing Daxing District Hongxing Hospital, Beijing, China,
11. Beijing Chui Yang Liu Hospital, Beijing, China,
12. Peking University Shougang Hospital, Beijing, China,
13. Combined with Traditional Chinese and Western Medicine Hospital of Beijing City, Beijing, China,
14. Beijing No.6 Hospital, Beijing, China,
15. Beijing Changping Hospital of Traditional Chinese Medicine, Beijing, China, and
16. General Hospital of Jingmei Group, Beijing, China