1. Department of Biostatistics and Epidemiology, School of Public Health, The University of North Texas Health Science Center, Fort Worth, TX, USA
2. Centre of Excellence for Research in AIDS (CERiA), University of Malaya, Kuala Lumpur, Malaysia
3. School of Medicine, Yale University, New Haven, CT, USA
4. Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
5. School of Psychology, Faculty of Science, The University of New South Wales, Sydney, Australia
6. Department of Human Development and Family Sciences, University of Delaware, Newark, DE, USA