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Article History

Received: 21 February 2019

Accepted: 28 October 2019

First Online: 14 November 2019

Ethics approval and consent to participate

: This study was approved by the Ethics Committee of Gunma University Hospital. A written informed consent was obtained from the subject to publish this manuscript and any accompanying images. A copy of this consent is available for review by the Editor-in-Chief of this journal. All procedures followed in this study complied with the ethical standards of the responsible committee for human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2008.

: All participants understand that the information will be published anonymously, but that full anonymity cannot be guaranteed. We understand that the text and any pictures or videos published in the article will be freely available on the Internet and may be seen by the general public. Pictures, videos, and text may also appear on other websites or in print and may be translated into other languages or used for commercial purposes.

: The authors declare that they have no competing interests.