1. Unit of Biostatistics and Bioinformatics, Division of Research and Networking, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Malaysia
2. Department of Community Health, Advanced Medical and Dental Institute, Universiti Sains Malaysia, Bertam, Malaysia
3. Department of Community Medicine, School of Medical Sciences, Universiti Sains Malaysia, Kelantan, Malaysia
4. Faculty of Health Sciences, Universiti Teknologi MARA, Cawangan Pulau Pinang, Kepala Batas, Malaysia