Working Environment of Cardiovascular Surgeons in Japan : A Survey of Work Hours, Payment, and Task-Shifting 論文 Ikuko Shibasaki・Akihiko Usui・Shigeki Morita・Hitoshi Yokoyama ·2020-01-15 ·『Japanese Journal of Cardiovascular Surgery』 49(1) pp. 1-11 doi:10.4326/jjcvs.49.1