1. Department of Medical Imaging and Radiation Sciences, Faculty of Health Sciences, 6306a John Orr Building, Doornfontein, Corner Simert and Biet St., Johannesburg, Gauteng, South Africa
2. Department of Nursing, Faculty of Health Sciences, University of Johannesburg, Office 6105D, West Wing North, John Orr Building, Doornfontein Campus, Corner Siemert and Biet St., Johannesburg, Gauteng, South Africa
3. School of Dentistry and Health Sciences, University of Exeter, College of Medicine and Health, Room 1.32, South Cloisters, Devon, 79 Heavitree Rd., Exeter EX1 2LT, United Kingdom.