1. Department of Dentistry; Jinnah Postgraduate Medical Centre; Karachi Pakistan
2. Department of Prosthetic Dental Sciences; College of Dentistry; King Saud University; Riyadh Saudi Arabia
3. Eng. Abdullah Bugshan research chair for Dental and Oral Rehabilitation; College of Dentistry; King Saud University; Riyadh Saudi Arabia
4. Department of Mechanical Engineering; Pennsylvania State University; PA
5. Department of General Dentistry; Eastman Institute for Oral Health; University of Rochester; NY