Matsumoto, Shokei
Funabiki, Tomohiro
Hayashida, Kei
Yamazaki, Motoyasu
Ebihara, Takayuki
Moriya, Takashi
Article History
First Online: 28 February 2020
Compliance with ethical standards
: This retrospective study was approved by the institutional review board of each hospital.
: The authors declare that they have no conflict of interest.