1. Biomechanics and Biotechnology Research, Aerospace Engineering, Department of Engineering and Mathematics, Sheaf Building, Sheffield Hallam University, Sheffield, S1 1WB, UK, England, UK
2. Mechanical Engineering Department, Engineering Faculty of Bu-Ali Sina University, Hamedan, Iran
3. Bio-Engineering Research, 15 Southmere Avenue, Bradford, BD7 3NU, England, UK