1. Katz Department of Oral and Maxillofacial Surgery, The University of Texas Health Science Center at Houston School of Dentistry, Houston, Texas, USA.
2. Department of Chemistry, Rice University, Houston, Texas, USA.
3. Department of Bioengineering, Rice University, Houston, Texas, USA.
4. Department of Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA.