1Department of Internal Medicine, Edendale Hospital, School of Clinical Medicine (SCM), University of KwaZulu-Natal (UKZN), South Africa
2Division of Internal Medicine, SCM, College of Health Sciences, UKZN, South Africa
3Mahatma Gandhi Memorial Hospital, Durban, South Africa
4Department of Orthopaedics, University of Witwatersrand, South Africa
5Division of Rheumatology, Faculty of Health Sciences, University of Cape Town, South Africa
6Division of Orthopaedics, Stellenbosch University, South Africa
7Division of Endocrinology, Stellenbosch University, South Africa
8Discipline of Public Health Medicine, SCM, College of Health Sciences, UKZN, South Africa
9Department of Geriatrics, SCM, College of Health Sciences, UKZN, South Africa