1 Dotter Interventional Institute, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, 97239-3011 Portland, OR, USA; Department of Radiology, Okayama University Medical School, 2-5-1 Sikata-cho, Kita-ku, 700-8558 Okayama, Japan. Electronic address: y-matsui@okayama-u.ac.jp.
2 Dotter Interventional Institute, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, 97239-3011 Portland, OR, USA; Madison Radiologists, S.C., P.O. Box 44428, 53744-4428 Madison, WI, USA.
3 Dotter Interventional Institute, Oregon Health and Science University, 3181 SW Sam Jackson Park Rd, 97239-3011 Portland, OR, USA.