1 Musculoskeletal Research Center, Isfahan University of Medical Sciences, Isfahan, Iran; Rehabilitation Sciences Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
2 Clinic for Orthopaedics and Trauma Surgery, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118, Heidelberg, Germany.
3 Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran; Department of Applied Physics, University of Eastern Finland, Kuopio, Finland.
4 Clinic for Orthopaedics and Trauma Surgery, Heidelberg University Hospital, Schlierbacher Landstrasse 200a, 69118, Heidelberg, Germany. Electronic address: Sebastian.Wolf@med.uni-heidelberg.de.