1 | Department of Medicine, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia |
2 | Darul Ehsan Medical Centre, Selangor, Malaysia |
3 | Malaysian Research Institute of Aging, Universiti Putra Malaysia, Malaysia |
4 | Department of ENT, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia |
5 | Department of Family Medicine, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Malaysia |