1. Department of Nursing, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
2. Department of Pain Clinic, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
3. Department of Obstetrics and Gynecology, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
4. Department of Pediatrics, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou Province, China
5. Department of Pediatrics, Guizhou Children’s Hospital, Guiyang, Guizhou Province, China.