[1] Univ Malaya, Fac Med, Dept Med, Kuala Lumpur, Malaysia
[2] Univ Malaya, Fac Med, Ageing & Age Associated Disorders Res Grp, Kuala Lumpur, Malaysia
[3] Univ Malaya, Fac Med, Dept Med, Div Geriatr Med, Kuala Lumpur, Malaysia
[4] Sunway Univ, Fac Healthcare & Med Sci, Dept Med Sci, Bandar Sunway, Malaysia