1. Bioengineering Program, Institute for Bioengineering Research, University of Kansas, Lawrence, Kansas 66045, United States
2. Herman Ostrow School of Dentistry of USC, Center for Craniofacial Molecular Biology, University of Southern California, 2250 Alcazar Street, Clinical Science Annex Room 142, Health Sciences Campus, Los Angeles, California 90089-0641, United States
3. Herman Ostrow School of Dentistry of USC, Division of Periodontology, Diagnostic Services, & Dental Hygiene, University of Southern California, Los Angeles, California 90089-0641, United States
4. Mechanical Engineering Department, University of Kansas, Lawrence, Kansas 66045, United States