1 Department of Physiotherapy, Busia County Referral Hospital, Busia, Kenya.
2 Department of Physiotherapy, College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.
3 Center for Research in Spinal Health and Rehabilitation Medicine, Department of Physiotherapy, College of Health Sciences, Jomo Kenyatta University of Agriculture and Technology, Nairobi, Kenya.
4 Department of Health and Rehabilitation Sciences, Stellenbosch University, Cape Town, South Africa.