[1] Univ Putra Malaysia, Fac Med & Hlth Sci, Dept Family Med, Serdang 43400, Selangor Darul, Malaysia
[2] Univ Malaya, Fac Med, Dept Primary Care Med, Jalan Lembah Pantai, Kuala Lumpur 50603, Malaysia
[3] Univ Malaya, Fac Med, Dept Surg, Jalan Lembah Pantai, Kuala Lumpur 50603, Malaysia
[4] Univ Malaya, Fac Med, Dept Nursing Sci, Jalan Lembah Pantai, Kuala Lumpur 50603, Malaysia