1. Centre for Health Management and Policy Research, School of Public Health,Cheeloo College of Medicine, Shandong University, Jinan, China
2. NHC Key Lab of Health Economics and Policy Research, Shandong University, Jinan, China
3. Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, China
4. School of Public Health, Qingdao University, China