Text and Data Mining valid from 2019-04-10
Received: 11 December 2018
Accepted: 4 April 2019
First Online: 10 April 2019
Compliance with ethical standards
: Masataka Okuno, Norihiro Yuasa, Eiji Takeuchi, Yasutomo Goto, Hideo Miyake, Hidemasa Nagai, Yuichiro Yoshioka and Kanji Miyata declare that they have no conflict of interest.
: All procedures followed have been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments.
: Informed consent was obtained from the patient for the publication of this report.