Kohei Yumii, MD, PhD, graduated from Kyorin University in 2014 and joined the Department of Otolaryngology–Head and Neck Surgery at Hiroshima University in 2016. He obtained his PhD from Hiroshima University Graduate School in 2024. From 2024 to 2025, he completed residency training in Head and Neck Surgery at Shizuoka Cancer Center. He is currently a head and neck surgeon at Hiroshima University.