[1] Univ Malaya, Fac Pharm, Dept Clin Pharm & Pharm Practice, Kuala Lumpur, Malaysia
[2] Univ Malaya, Fac Med, Ctr Excellence Res AIDS CERiA, Kuala Lumpur, Malaysia
[3] Univ North Texas Hlth Sci Ctr, Sch Publ Hlth, Dept Populat & Community Hlth, Ft Worth, TX USA
[4] Univ Delaware, Dept Human Dev & Family Sci, Newark, DE USA
[5] Int Med Univ, Sch Hlth Sci, Kuala Lumpur, Malaysia
[6] Univ Malaya, Fac Med, Dept Med, Kuala Lumpur 50603, Malaysia