1. King Saud Medical City, Riyadh, Saudi Arabia
2. College of Graduate Studies (COGS), Universiti Tenaga Nasional (UNITEN), Putrajaya Campus, Jalan IKRAM-UNITEN, Kajang 4300, Selangor, Malaysia
3. Institute of Energy Policy and Research (IEPRe), Universiti Tenaga Nasional (UNITEN), Putrajaya Campus, Jalan IKRAM-UNITEN, Kajang 4300, Selangor, Malaysia
4. College of Business Management and Accounting (COBA), Universiti Tenaga Nasional (UNITEN), Putrajaya Campus, Jalan IKRAM-UNITEN, Kajang 43000, Selangor, Malaysia