Text and Data Mining valid from 2019-07-05
Received: 10 April 2019
Revised: 4 June 2019
Accepted: 13 June 2019
First Online: 5 July 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Toshifumi Gabata, M.D., Ph.D.
: The authors declare that they have no competing interests.
: No complex statistical methods were necessary for this paper.
: Written informed consent was waived by the Institutional Review Board.
: Approval was obtained from the Institutional Review Board of Kanazawa University Graduate School of Medical Sciences, Japan.
: • retrospective• observational• performed at one institution