1. University College of Dentistry, University of Lahore, Lahore, Pakistan
2. Azra Naheed Dental College, Lahore, Pakistan
3. Sharif Medical and Dental College, Lahore, Pakistan
4. Sahara Medical College, Narowal, Sahara, Pakistan
5. College of Dentistry, Jouf University, Sakaka, 72345 Al-Jouf, Saudi Arabia