[1] British Columbia Childrens Hosp, Dept Radiol, Vancouver, BC V6H 3V4, Canada
[2] Vancouver Gen Hosp, Dept Radiol, Vancouver, BC V5Z 1M9, Canada
[3] Univ Toronto, Dept Med Imaging, Toronto, ON, Canada
[4] Hosp Sick Children, Ctr Image Guided Therapy, Toronto, ON M5G 1X8, Canada
[5] Vein Inst Toronto, Toronto, ON, Canada
[6] Scarborough Gen Hosp, Dept Diagnost Imaging, Scarborough, ON, Canada
[7] Ctr Hosp Univ St Justine, Dept Med Imaging, Montreal, PQ, Canada
[8] James Whitcomb Riley Hosp Children, Dept Radiol, Indianapolis, IN 46202 USA
[9] Boston Healthcare Syst Vet Affairs Med Ctr, Dept Radiol, Boston, MA USA
[10] Phoenix Childrens Hosp, Dept Radiol, Phoenix, AZ USA
[11] Childrens Hosp Pittsburgh, Dept Radiol, Div Cardiovasc & Intervent Radiol, Pittsburgh, PA 15213 USA
[12] Reading Hosp Med Ctr, Dept Intervent Radiol, Danville, PA USA
[13] Geisinger Hlth Syst, Danville, PA USA
[14] Univ Hosp, Dept Radiol, Cincinnati, OH USA
[15] Uniformed Serv Univ Hlth Sci, Dept Radiol & Radiol Sci, Bethesda, MD 20814 USA
[16] Natl Naval Med Ctr, Dept Radiol, Bethesda, MD USA
[17] Great Ormond St Hosp Sick Children, Dept Radiol, London, England
[18] Univ Calif San Diego, Med Ctr, Dept Radiol, San Diego, CA 92103 USA
[19] Seattle Childrens Hosp, Dept Radiol, Seattle, WA USA
[20] Univ Washington, Sch Med, Seattle, WA USA
[21] Univ Texas MD Anderson Canc Ctr, Dept Intervent Radiol, Houston, TX 77030 USA