1. Infectious Disease Unit, Department of Medicine, Sarawak General Hospital, Kuching, Sarawak, Malaysia
2. Department of Paediatrics, Bintulu Hospital, Bintulu, Sarawak, Malaysia
3. Institute of Health and Community Medicine, Universiti Malaysia Sarawak, Sarawak, Malaysia
4. Department of Paediatrics, Sarawak General Hospital, Kuching, Sarawak, Malaysia
5. Department of Pathology, Bintulu Hospital, Bintulu, Sarawak, Malaysia
6. Bintulu Medical Centre, Bintulu, Sarawak, Malaysia
7. Global and Tropical Health Division, Menzies School of Health Research, Charles Darwin University, Darwin, Northern Territory, Australia
8. Borneo Medical Centre, Kuching, Sarawak, Malaysia
9. Faculty of Medicine and Health Sciences, Universiti Malaysia Sarawak, Sarawak, Malaysia