1. Communication Systems and Networks Research Group, Department of Electrical and Computer Engineering, Faculty of Engineering, King Abdulaziz University, Jeddah 21589, Saudi Arabia
2. Institute of Electrical and Electronics Engineers, Toronto, ON M5V3T9, Canada
3. School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China
4. School of Information Science and Engineering, Dalian Polytechnic University, Dalian 116034, China
5. FEMA, University of Malta, MSD 2080 Msida, Malta
6. LSE Health, Department of Health Policy, London School of Economics and Political Science, London WC2A2AE, UK
7. IPAG Business School, 184 Boulevard Saint-Germain, 75006 Paris, France