1. Department of Gynaecology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong, China
2. Department of Laboratory Medicine, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, Guangdong, China
3. Department of Emergency, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou 510630, Guangdong, China