1. Department of Biomedical Engineering, Texas A&M University, Emerging Technologies Building, 3120 TAMU, College Station, Texas 77843, USA
2. Department of Electrical and Computer Engineering, Stephenson Research and Technology Center, University of Oklahoma, Suite 1108, 101 Davild L Boren Blvd., Norman, Oklahoma 73072, USA
3. The Caruso Department of Otolaryngology-Head and Neck Surgery, University of Southern California, 1501 San Pablo St., Los Angeles, California 90033, USA