1. Department of Computer Science and Software Engineering, International Islamic University Islamabad, Islamabad, Pakistan
2. Department of Information and Communication Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
3. Department of Computer Engineering, Faculty of Engineering and Architecture, Istanbul Gelisim University, Istanbul, Turkey
4. Faculty of Computing Engineering and Science, University of South Wales, Pontypridd CF37 1DL, UK