1. Department of Orthotics and Prosthetics University of Social Welfare and Rehabilitation Sciences Tehran Iran
2. Department of Orthotics and Prosthetics Sahlgrenska University Hospital Gothenburg Sweden
3. Red Crescent Society Yazd Iran
4. Department of Orthotics and Prosthetics, School of Rehabilitation Sciences Iran University of Medical Sciences Tehran Iran
5. Department of Biostatistics University of Social Welfare and Rehabilitation Sciences Tehran Iran