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Article History

Received: 1 August 2019

Accepted: 26 December 2019

First Online: 3 January 2020

Ethics approval and consent to participate

: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. This study was approved by the Ethics Committee at Musashi Kokubunji Park Clinic (Institutional Review Board study ID: 004) with a waiver of informed consent.

: Not applicable.

: The authors declare that they have no competing interests.