1. School of Nursing, Fujian Medical University, Fuzhou, Fujian, China
2. Labor Room, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics, Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China
3. Nursing Department & Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, China