1. Department of Otorhinolaryngology‐Head and Neck Surgery, Chuncheon Sacred Heart Hospital and Institute of New Frontier Research Hallym University College of Medicine Chuncheon South Korea
2. Division of Pediatric Neurosurgery Seoul National University Children’s Hospital, Seoul National University College of Medicine Seoul South Korea
3. Department of Otorhinolaryngology‐Head and Neck Surgery, Boramae Medical Center Seoul National University College of Medicine Seoul South Korea