1. Department of Chemistry, University of Michigan, Ann Arbor, Michigan.
2. Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Michigan, Ann Arbor, Michigan.
3. Department of Surgery, University of Michigan, Ann Arbor, Michigan.
4. Cincinnati, Ohio.
5. Department of Oral Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Japan.