1. Department of Environmental Sciences, Faculty of Meteorology, Environment, and Arid Land Agriculture, King Abdulaziz University, PO Box 80208, Jeddah 21589, Saudi Arabia
2. School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK
3. School of Medicine, Health Policy and Practice, University of East Anglia, Norwich NR4 7TJ, UK