1. Research Center for Ageing Society of Jiangxi Provincial Association of Social Science, Gannan Normal University, Ganzhou, China
2. School of Business Analytics and Decision Making, Coventry University, Coventry, UK
3. Department of Mathematics and Statistics, Hazara University Mansehra, Pakistan
4. Faculty of Economics, University of Birmingham, Birmingham, UK
5. Research Centre, Future University in Egypt, New Cairo, Egypt
6. Department of Industrial Engineering, College of Engineering, Prince Sattam Bin Abdulaziz University, AI Kharj, Saudi Arabia
7. Mechnical Engineering Department, Faculty of Engineering (Shoubra), Benga University, Cairo, Egypt