1. Department of Transfusion Medicine; Southern Medical University; Guangzhou China
2. Department of Hematology; University of Cambridge; Cambridge United Kingdom
3. Department of Infectious Diseases; Nanfang Hospital; Southern Medical University; Guangzhou China
4. Department of Paediatrics; Nanfang Hospital; Southern Medical University; Guangzhou China
5. Department of Obstetrics and Gynecology; Nanfang Hospital; Southern Medical University; Guangzhou China
6. Guangzhou Blood Center; Guangzhou China
7. School of Public Health and Tropical Medicine; Southern Medical University; Guangzhou China