1. Department of Haematology; Zhujiang Hospital of Southern Medical University; Guangzhou China
2. Department of Geriatric Haematology; Guangzhou First People's Hospital; Guangzhou China
3. Department of Haematology; Shunde Hospital of Southern Medical University; Foshan China
4. Department of Paediatrics; Zhujiang Hospital of Southern Medical University; Guangzhou China
5. Department of Haematology; Kanghua Hospital; Dongguan China