1. Divisions of Periodontology and General Dentistry, Unit of Laser Dentistry, Eastman Dental Center, University of Rochester, Rochester, New York, New York.
2. Department of Oral Surgery and Implant Dentistry, Dental School (Carolinum), University of Frankfurt, Frankfurt, Germany.
3. Department of Periodontology and Implant Dentistry, College of Dentistry, New York University, New York, New York.