1 CKD resource centre, Hospital Universiti Sains Malaysia, Kota Bharu, Kelantan, Malaysia.
2 Universiti Sains Malaysia, Minden, Malaysia.
3 Universiti Sains Malaysia, Penang, Malaysia.
4 Urology Unit, Department of Surgery, Health Campus, Universiti Sains Malaysia, Kubang Kerian, 16150, Kelantan, Malaysia, Kelantan Malaysia, Malaysia.