1. Department of IT ConvergenceKorea National University of Transportation Chungju 380‐702 Republic of Korea
2. Department of Otolaryngology−Head and Neck SurgeryKosin University College of Medicine Busan 49267 Republic of Korea
3. Department of Polymer Science and EngineeringKorea National University of Transportation Chungju 380‐702 Republic of Korea
4. Department of Chemical and Biological EngineeringKorea National University of Transportation Chungju 380‐702 Republic of Korea