1. School of Health Management Southern Medical University Guangzhou China
2. Department of Medical Dispute Maternal and Child Health Hospital Heyuan China
3. School of Public Health Southern Medical University Guangzhou China
4. The Third Affiliated Hospital of Sun Yat‐sen University Guangzhou China
5. The Second Affiliated Hospital of Harbin Medical University Harbin China
6. Guangzhou Center for Disease Control and Prevention Guangzhou China
7. Nanfang Hospital Southern Medical University Guangzhou China
8. Institute of Health Management Southern Medical University Guangzhou Guangzhou China