1. KLES, Institute of Dental Sciences, Bangalore, India;
2. College of Dentistry, King Abdulaziz University and Alfarabi Private College for Dentistry and Nursing, Jeddah, Saudi Arabia;
3. College of Dentistry Jazan University, Jazan, Saudi Arabia;
4. Sri Venkateswara Dental College and Hospital, Chennai, India;
5. Professor Emeritus at the University of Gothenburg, Gothenburg, Sweden