1) Department of Surgery, National Center for Global Health and Medicine, Tokyo, Japan
2) Department of Operating theater, National Center for Global Health and Medicine, Tokyo, Japan
3) Department of Disease Control and Prevention Center, National Center for Global Health and Medicine, Tokyo, Japan
4) Department of Laboratory Testing Department, National Center for Global Health and Medicine, Tokyo, Japan
5) Department of Nursing, National Center for Global Health and Medicine, Tokyo, Japan
6) Department of Medical Department, National Center for Global Health and Medicine, Tokyo, Japan

Kazuhiko Yamada¹⁾²⁾, Tetuo Hara²⁾, Yuka Hayashi²⁾, Kei Yamamoto³⁾, Mitsuru Koseki⁴⁾, Michi Shoji⁴⁾, Yuko Sugiki⁵⁾, Aika Sasahara⁵⁾, Ayano Mochizuki⁶⁾, Chiharu Gonbori⁶⁾, Kazunori Sugai⁶⁾, Norihiro Kokudo¹⁾