1. University of Liverpool; Department of Health Services Research; Waterhouse Building, Block B, 1st Floor, Room B113 1-5 Brownlow Street Liverpool UK L69 3GL
2. La Trobe University; Department of Dentistry and Oral Health, La Trobe Rural Health School; Bendigo Australia
3. HEIT Solutions; 58B Itolo Street, Off Eric Moore Surulere Lagos Nigeria
4. Stellenbosch University; Centre for Evidence-based Health Care, Faculty of Medicine and Health Sciences; Francie van Zijl Drive Tygerberg Cape Town South Africa 7505
5. University of Liverpool; Department of Biostatistics, Institute of Translational Medicine, Faculty of Health and Life Sciences; Liverpool UK