[1] Kuala Lumpur Hosp, Minist Hlth Malaysia, Clin Res Ctr, Kuala Lumpur 50586, Malaysia
[2] Univ Med Ctr Utrecht, Julius Ctr Hlth Sci & Primary Care, Utrecht, Netherlands
[3] Univ Malaya, Dept Social & Prevent Med, Julius Ctr Univ Malaya, Kuala Lumpur, Malaysia
[4] Univ Med Ctr Utrecht, Dept Vasc Med, Utrecht, Netherlands