Table 1 Participating institutions and investigators

Chukyo Hospital

Akinori Osuka, MD, PhD

Ebina General Hospital

Takeshi Yamagiwa, MD, PhD

Hitachi General Hospital

Kensuke Nakamura, MD, PhD

Kansai Medical University Hospital

Hiroki Takahashi, MD

Kansai Medical University Medical Center

Masahiro Kawada, MD

Nagasaki University Hospital

Shuhei Yamano, MD

Osaka General Medical Center

Jumpei Yoshimura, MD

Saga University Hospital

Hiroyuki Koami, MD, PhD

University of the Ryukyus Hospital

Takayuki Taira, MD

Wakayama Medical University Hospital

Kyohei Miyamoto, MD