1. Sabah State Health Department, Kota Kinabalu, Malaysia;
2. Department of Community and Family Medicine, Faculty of Medicine and Health Sciences, University Malaysia Sabah, Kota Kinabalu, Malaysia;
3. Ministry of Health Malaysia, Putrajaya, Malaysia;
4. Borneo Medical and Health Research Centre, Kota kinabalu, Malaysia;
5. Department of Pathobiology and Medical Diagnostics, Faculty of Medicine and Health Sciences, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia