[1] Department of Rehabilitation, College of Health Sciences, University of Zimbabwe Avondale, P.O Box A178, Harare
[2] Department of Community Medicine, College of Health Sciences, University of Zimbabwe Avondale, P.O Box A178, Harare
[3] School of Health and Rehabilitation Sciences, Faculty of Health Sciences, University of Cape Town Observatory, Cape Town
[4] Department of Physiotherapy, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg