Text and Data Mining valid from 2018-08-11
Received: 11 June 2018
Accepted: 5 August 2018
First Online: 11 August 2018
Compliance with ethical standards
: All the procedures were followed in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions.
: Informed consent was obtained from all patients for inclusion in the study.
: Yuko Kitagawa received designated donation from Daiichi Sankyo Co., Ltd.