Funding for this research was provided by:
Text and Data Mining valid from 2020-01-06
Received: 15 March 2019
Accepted: 30 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan (2018–0137). Patients did not need to give informed consent to the study because the analysis utilized unknown clinical details that were attained following each patient agreeing to treatment by written consent.
: Not applicable.
: The authors declare that they have no competing interests.