1. Paediatric Pain and Palliative Care Unit Department of Paediatrics Faculty of Medicine University Malaya Kuala Lumpur Malaysia
2. Division of Paediatric Neurology Department of Paediatrics Faculty of Medicine University Malaya Kuala Lumpur Malaysia
3. Paediatric Department Penang General Hospital Penang Malaysia
4. Division of Paediatric Neurology Department of Paediatrics University Malaya Medical Centre Kuala Lumpur Malaysia