Received: 8 April 2019
Accepted: 25 September 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: Informed consent was obtained from all patients, and this study protocol was conducted in accordance with the Principles of the Declaration of Helsinki and the Declaration of Istanbul, and was approved by the institutional review boards at the Meisei-kai Toyo clinic, Chiba, Japan.
: Not applicable.
: The authors declare that they have no competing interests.