John E. Hall, DDS, graduated from Baylor College of Dentistry in 1978, and practiced general dentistry in Arlington, Texas, for 8 years.  After retiring from dental practice, he worked in R&D departments of various companies where he was involved in developing and performing several investigational programs.  He developed and oversaw clinical trials (Phases I-III) in ulcerative colitis and AIDS and those involving various intraoral conditions. He helped develop several products for medical, dental, and veterinary use.  Dr. Hall is co-author of papers published in medical and dental journals.  He currently works with MCMP, Arlington, TX, where he is involved in product development, clinical trials, and education.