[1] Univ KwaZulu Natal, Coll Hlth Sci, Dept Family Med, Durban, South Africa
[2] Univ Cape Town, Fac Hlth Sci, Dept Family Community & Emergency Care, Cape Town, South Africa
[3] Univ KwaZulu Natal, Fac Med, Dept Family Med, Durban, South Africa
[4] Univ KwaZulu Natal, Fac Hlth Sci, Dept Family Med, Durban, South Africa