1. Department of Paediatrics, The Chinese University of Hong Kong, Shatin, Hong Kong;
2. Department of Medicine, Loma Linda University, Loma Linda, CA;
3. Department of Obstetrics and Gynaecology;
4. Department of Anatomical and Cellular Pathology;
5. School of Biomedical Sciences;
6. Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Shatin, Hong Kong;
7. Hong Kong Red Cross Blood Transfusion Service, Yau Ma Tei, Hong Kong;
8. Division of Hematology/Oncology, Department of Pediatrics, The Seventh Affiliated Hospital, Sun Yat-Sen University, Shenzhen, China; and
9. Hong Kong Hub of Paediatric Excellence, The Chinese University of Hong Kong, Shatin, Hong Kong