1. Department of Hematology, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
2. Department of Paediatrics, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
3. The Research Center of Seventh Affiliated Hospital, Sun Yat‑sen University, Shenzhen, Guangdong 518107, P.R. China