1. Texas A&M University, Department of Biomedical Engineering, College Station, Texas 77843, United States
2. University of Texas M.D. Anderson Cancer Center, Department of Carcinogenesis, Smithville, Texas 78957, United States
3. Texas A&M University Health Science Center—Baylor College of Dentistry, Department of Diagnostic Sciences, 3302 Gaston Avenue, Dallas, Texas 75246, United States