1. Department of Mechanical, Mechatronics and Manufacturing Engineering, University of Engineering and Technology, Pakistan and School of Mechanical Engineering, University of Leeds, Leeds, UK
2. School of Mechanical Engineering, University of Leeds, Leeds, UK
3. School of Electronic and Electrical Engineering, University of Leeds, Leeds, UK and Institute of Rehabilitation Engineering, Binzhou Medical University, Yantai, China
4. Department of Mechanical, Mechatronics and Manufacturing Engineering, University of Engineering and Technology, Lahore, Pakistan