1. Department of Health Promotion and Education, School of Public Health, University of Zambia, Lusaka, Zambia
2. Department of Psychology, School of Humanities and Social Sciences, University of Zambia, Lusaka, Zambia
3. Centre for Infectious Disease Research in Zambia, Lusaka, Zambia
4. Department of Population and Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA, USA
5. Department of Behavioral Sciences and Social Medicine, Centre for Translational Behavioral Science, Florida State College of Medicine, FL, USA