1. Oregon Health Sciences University, Portland, OR, USA
2. Centro Clínico de Cabeza y Cuello/Hospital Herrera Llerandi, Guatemala City, Guatemala
3. Department of Medical and Molecular Genetics Indiana University School of Medicine Indianapolis, IN, USA
4. Department of Anatomy and Cell Biology Indiana University School of Medicine Indianapolis, IN, USA
5. Department of Oral Pathology, Medicine and Radiology Indiana University School of DentistryIndianapolis, IN, USA