Koizumi, Mitsuhito
Kumagi, Teru
Kuroda, Taira
Imamura, Yoshiki
Kanemitsu, Kozue
Ogawa, Kohei
Takada, Yasutsugu
Hiasa, Yoichi
Article History
Received: 20 September 2019
Accepted: 19 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: Institutional review board of the Ehime University Graduate School of Medicine approved the study (Approval No. 1705002) but written consent form was waived due to the retrospective nature of the study using opt-out methodology.
: Not applicable.
: The authors declare that they have no competing interests.