Received: 27 September 2017
Accepted: 4 January 2019
First Online: 11 January 2019
Ethics approval and consent to participate
: This research was approved by the research ethics committee of Graduate School of Medicine and Faculty of Medicine, The University of Tokyo, and informed consent was obtained from the patient.
: Written informed consent for publication of the clinical details and clinical images was obtained from the relative of the patient.
: The authors declare that they have no competing interests.
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