1. Hematology Unit, Cancer Research Centre, Institute for Medical Research (IMR), National Institute of Health (NIH) Ministry of Health Malaysia Shah Alam Selangor Malaysia
2. Immunodeficiency & Immunogenetics Unit, Allergy & Immunology Research Centre, Institute for Medical Research (IMR), National Institute of Health (NIH) Ministry of Health Malaysia Shah Alam Selangor Malaysia
3. Department of Pediatrics Hospital Sultanah Bahiyah (HSB) Alor Setar Kedah Malaysia
4. Department of Pathology Hospital Sultanah Bahiyah (HSB) Alor Setar Kedah Malaysia