About the Authors

Salla A Munro, Mark E Engel, Jimmy Volmink
South African Cochrane Centre, Medical Research Council of South Africa, Cape Town, South Africa

Salla A Munro
Primary Health Care Directorate, University of Cape Town, Cape Town, South Africa

Salla A Munro, Simon A Lewin
Health Systems Research Unit, Medical Research Council of South Africa, Cape Town, South Africa

Simon A Lewin
Department of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom

Helen J Smith
International Health Group, Liverpool School of Tropical Medicine, Liverpool, United Kingdom

Mark E Engel
Department of Medicine, University of Cape Town, Cape Town, South Africa

Atle Fretheim
Norwegian Knowledge Centre for the Health Services, Oslo, Norway

Jimmy Volmink
University of Stellenbosch, Faculty of Health Sciences, Cape Town, South Africa

Corresponding Author

salla.munro@mrc.ac.za

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

SAM, SAL, MEE, AF, and JV developed the protocol and conceptualised the study. All authors participated in data extraction, quality assessment tool development, quality assessment and in retrieving the studies. SAM, SAL, and HJS analysed the data, with later analysis supported by all authors. SAM wrote the initial draft; SAM, SAL, and HJS edited the manuscript; and all authors contributed to the final draft.