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Authors
Nakakura, Ichiro https://orcid.org/0000-0002-4944-5196
Sakakura, Kota
Imanishi, Kaori
Sako, Rumi
Yamazaki, Kunio
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Article History
Received: 21 January 2019
Accepted: 9 April 2019
First Online: 16 May 2019
Ethics approval and consent to participate
: This study was conducted in compliance with the standards of the Declaration of Helsinki and the current ethical guidelines. The study was approved by the ethics committee board of the Osaka National Hospital, reference number: 16148. To protect patient privacy, identifying data were encrypted in an electronic database. Written informed consent was exempted because no intervention was involved, and patient-identifying data were not included in the study.
: Not applicable.
: The authors declare that they have no competing interests.
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