1. School of Social Work, Columbia University, New York, NY, USA
2. HIV Center for Clinical and Behavioral Studies, Columbia University and New York State Psychiatric Institute, New York, NY, USA
3. HIV Mental Health Research Unit, Division of Neuropsychiatry, Department of Psychiatry and Mental Health, University of Cape Town, Cape Town, South Africa
4. School of Public Health & Family Medicine, University of Cape Town, Cape Town, South Africa
5. Numeracy Centre, Centre for Higher Education Development, University of Cape Town, Cape Town, South Africa