Text and Data Mining valid from 2019-02-08
Received: 12 September 2018
Accepted: 14 January 2019
First Online: 8 February 2019
Compliance with ethical standards
: This study was approved by the Research Ethics Committee of Nagoya University Hospital on August 30, 2016 (Protocol number 2015-0420). In accordance with the Declaration of Helsinki, written informed consent was obtained from all patients before registration. This study is registered in University Hospital Medical Information Network Clinical Trials Registry (UMIN ID: 000020269).