1. Obstetrics and Gynecology Department; West China Second University Hospital; Sichuan University; Sichuan China
2. School of Nursing; The Hong Kong Polytechnic University; Hong Kong SAR China
3. Quanzhou the 1st Affiliated Hospital of Fujian Medical University; Infectious Disease Unit; Fujian China
4. The 3rd Affiliated Hospital of Chongqing Medical University; Accident and Emergency; Sichuan China
5. Xia Cheng District Shiqiao Community Health Service Center; Hangzhou Zhejiang China
6. Aba Prefecture People's Hospital; Medical Department; Sichuan China
7. The First Affiliated Hospital of Fujian Medical University; Oral and Maxillofacial Surgery; Fujian China