1. Faculty of Information Technology, Beijing University of Technology, Beijing, China
2. Department of Software Engineering, University of Malakand, Dir Lower, Pakistan
3. Computer Engineering Department, College of Information Technology, University of Bahrain, Sakheer, Bahrain
4. Faculty of Computer Science and Engineering, Ghulam Ishaq Khan Institute of Engineering Sciences and Technology, Topi, Pakistan
5. School of Engineering, Edith Cowan University, Perth, WA, Australia