1. 4) Kobayashi T, Morita M, Yoshioka S, et al. : Diagnostic criteria for Patulous Eustachian Tube: A proposal by the Japan Otological Society. Auris Nasus Larynx 45: 1–5, 2018.
2. 9) Endo S, Mizuta K, Takahashi G, et al. : Postoperative Course of Pars Flaccida Cholesteatoma Patients with Habitual Sniffing. Otol Neurotol: 2020. in press
3. 11) Kobayashi T, Hasegawa J, Kikuchi T, et al. : Masked patulous Eustachian tube: an important diagnostic precaution before middle ear surgery. Tohoku J Exp Med 218: 317–324, 2009.
4. 12) Endo S, Mizuta K, Takahashi G, et al. : The effect of ventilation tube insertion or trans-tympanic silicone plug insertion on a patulous Eustachian tube. Acta Otolaryngol 136: 551–555, 2016.