Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yamamoto Yutaka and Morita Yuka and Takahashi Kuniyuki and Ohshima Shinsuke and Takahashi Sugata,Clinical behavior of the secondary acquired cholesteatoma analyzed with the classification of progress level,Otology Japan,0917-2025,Japan Otological Society,2014,24,5,811-815,https://cir.nii.ac.jp/crid/1390282679749375104,https://doi.org/10.11289/otoljpn.24.811