Myelin Oligodendrocyte Glycoprotein Antibody‐Associated Optic Neuritis With Perineuritis Treated With Immunoadsorption Plasmapheresis in a 91‐Year‐Old Woman: A Case Report - Isamu Takai; Yuji Tomizawa; Yasunobu Hoshino; Chikage Kijima; Natsumi Takemura; Naoto Arawaka; Rei Iwamoto; Eitaro Yoshida; Takashi Kyomoto; Kazumasa Yokoyama; Shintaro Nakao; Taku Hatano (Clinical and Experimental Neuroimmunology, 2026)