1. Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
2. Department of Psychiatry, Stellenbosch University, Stellenbosch, South Africa
3. Division of Health Services, Norwegian Institute of Public Health, Oslo, Norway
4. Usher Institute of Population Health Sciences and Informatics, The University of Edinburgh, Edinburgh, UK
5. Department of Global Health, Institute for Life Course Health Research, Stellenbosch University, Stellenbosch, South Africa
6. School of Nursing and Midwifery, Queen’s University, Belfast, UK
7. Biostatistics Unit, South African Medical Research Council, Cape Town, South Africa
8. Statistics and Population Studies, University of the Western Cape, Cape Town, South Africa
9. Family South Africa (FAMSA) Karoo, Oudsthoorn, South Africa
10. Department of Global Public Health, Karolinska Institutet, Stockholm, Sweden
11. New Social Research and Faculty of Social Sciences, Tampere University, Tampere, Finland