[1] Univ Stellenbosch, Dept Family & Emergency Med, Stellenbosch, South Africa
[2] Univ Stellenbosch, Div Family Med, Stellenbosch, South Africa
[3] Univ Stellenbosch, Primary Care Dept Family & Emergency Med, Stellenbosch, South Africa
[4] Univ Cape Town, Dept Family Community & Emergency Care, Div Family Med, Cape Town, South Africa
[5] Univ Cape Town, Cape Town, South Africa
[6] Univ Cape Town, Dept Family Med, Cape Town, South Africa