[1] Univ Putra Malaysia, UPM Teaching Hosp, Fac Med & Hlth Sci, Dept Rehabil Med, Serdang 43400, Selangor, Malaysia
[2] Univ Putra Malaysia, Malaysian Res Inst Ageing MyAgeing, Serdang 43400, Selangor, Malaysia
[3] Univ Malaya, Fac Med, Med Educ & Res Dev Unit MERDU, Kuala Lumpur 50603, Malaysia
[4] Univ Putra Malaysia, Fac Med & Hlth Sci, Dept Nursing, Serdang 43400, Selangor, Malaysia
[5] Univ Kebangsaan Malaysia, Fac Hlth Sci, Ctr Rehabil & Special Needs Studies, Occupat Therapy Programme, Kuala Lumpur 50300, Malaysia