Affiliation: | (1) From the Department of Cardiovascular Surgery, Kitakyushu Municipal Medical Center, Kitakyushu, Japan;(2) Department of Cardiovascular Surgery, Kyushu Kosei-Nenkin Hospital, 2-1-1 Kishinoura, Yahata-Nishi-ku, Kitakyushu, 806-8501 Fukuoka, Japan |