1. Clinical Characteristics of External Auditory Canal Cholesteatoma Associated with a History of Long-term Bisphosphonate Therapy
   Hiromi Kanazawa et al, 2018, Nippon Jibiinkoka Gakkai Kaiho CrossRef
2. External Auditory Canal Cholesteatoma with Chronic Renal Failure or Hemodialysis
   Ken Hashimoto et al, 2014, Nippon Jibiinkoka Gakkai Kaiho CrossRef