1. Department of Obstetrics and Gynaecology, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi, 445000 Hubei Province, China
2. Clinical Laboratory Center, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, No. 158 Wuyang Avenue, Enshi City, 445000 Hubei Province, China
3. Department of Radiology, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, No. 158 Wuyang Avenue, Enshi City, 445000 Hubei Province, China
4. Department of Infection, Enshi Tujia and Miao Autonomous Prefecture Center for Disease Control and Prevention, Hubei Province, China
5. Department of Anesthesiology, The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture, Enshi City, 445000 Hubei Province, China