1. School of Pharmacy Fujian Medical University Fuzhou China
2. Department of Pharmaceutical and Health Economics, School of Pharmacy University of Southern California Los Angeles California USA
3. Leonard D. Schaeffer Center for Health Policy and Economics University of Southern California Los Angeles California USA
4. Department of Pediatrics Fujian Medical University Union Hospital Fuzhou China
5. Department of Pharmacy Fujian Medical University Union Hospital Fuzhou China