Tae-Seok Seo Korea University College of Medicine Korea

Takehisa Iwai Tsukuba Vascular Center, Japanese Society Of Phlebology Japan

Tetsuro Miyata Medicine, International University of Health and WelfareVascular Center, Sanno Hospital and Sanno Medical Center Japan

Tomohiro Ogawa Cardivascular Disease Center, Fukushima Daiichi Hospital Japan