[1] Univ Malaya, Fac Med, Dept Rehabil Med, Kuala Lumpur, Malaysia
[2] Minist Hlth, Training Management Div, Putrajaya, Malaysia
[3] NIH, Minist Hlth, Inst Publ Hlth, Shah Alam, Selangor, Malaysia
[4] Univ Malaya, Fac Med, Dept Social & Prevent Med, Kuala Lumpur, Malaysia
[5] Univ Malaya, Fac Med, Dept Biomed Imaging, Kuala Lumpur, Malaysia
[6] Univ Malaya, Med Ctr, Dept Med, Cardiol Unit, Kuala Lumpur, Malaysia