1 Department of Otorhinolaryngology-Head and Neck Surgery, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.
2 Department of Developmental Biology and Genomics, College of Veterinary Medicine, Korea Mouse Phenotyping Center, Seoul National University, Seoul, Korea.
3 Department of Pathology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea.