A stand-up collar around the saphenous vein graft.
Terada
Yasushi
Y
Department of Heart Center, Shonai Amarume Hospital, Higasitagawa, Yamagata, Japan. y.terada@amarume-hp.jp
Sekii
Hiroyoshi
H
Ichikawa
Seiichi
S
Higashiue
Shinichi
S