Frederick Y Wu1,2*
, Eddy S Yang1*
, Christopher D Willey1
, Kim Ely3
, Gaelyn Garrett4
and Anthony J Cmelak1 
1
Department of Radiation Oncology, Vanderbilt University School of Medicine, Nashville, TN, USA
2
Department of Radiation Oncology, University of California at San Francisco, San Francisco, CA, USA
3
Department of Pathology, Vanderbilt University School of Medicine, Nashville, TN, USA
4
Department of Otolaryngology, Voice Center, Vanderbilt University School of Medicine, Nashville, TN, USA