[1] Stellenbosch Univ, Dept Global Hlth, Hlth Syst & Publ Hlth, Stellenbosch, South Africa
[2] Univ Western Cape, Fac Dent, Res & Postgrad Studies, Cape Town, South Africa
[3] Univ Cape Town, Dept Paediat & Child Hlth, Child Hlth Unit, Rondebosch, South Africa
[4] McMaster Univ, Dept Hlth Res Methods Evidence & Impact, Hamilton, ON, Canada
[5] St Josephs Healthcare Hamilton, Hamilton, ON, Canada