[1] Johns Hopkins Univ Hosp, Div Vasc & Intervent Radiol, Russel H Morgan Dept Radiol & Radiol Sci, Sheikh Zayed Tower,Ste 7203,1800 Orleans St, Baltimore, MD 21287 USA
[2] Charite, Dept Diagnost & Intervent Radiol, Campus Virchow Klinikum, Augustenburger Pl 1, D-13353 Berlin, Germany
[3] Philips Res North Amer, US Imaging & Intervent UII, Briarcliff Manor, NY USA
[4] Johns Hopkins Bloomberg Sch Publ Hlth, Baltimore, MD USA
[5] Johns Hopkins Univ Hosp, Dept Surg, Baltimore, MD 21287 USA
[6] Yale Univ, Dept Radiol & Biomed Imaging, Sch Med, 330 Cedar St,TE 2-230, New Haven, CT 06520 USA