1. Division of Health Sciences, Warwick Medical School, The University of Warwick; Warwick Centre for Applied Health Research and Delivery (WCAHRD); Warwick UK
2. University of Stellenbosch; Department of Civil Engineering; Private Bag X1 Matieland Western Cape South Africa 7602
3. Stellenbosch University Faculty of Health Sciences; Interdisciplinary Health Sciences; Francie van Zijl Avenue Cape Town South Africa
4. Stellenbosch University; Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences; PO Box 19063 Tygerberg Cape Town South Africa 7505