[1] Univ Texas Hlth Sci Ctr Houston, Dept Diagnost & Intervent Imaging, McGovern Med Sch, 6431 Fannin St,2-130B, Houston, TX 77030 USA
[2] Childrens Hosp & Clin Minnesota, Dept Radiol, 2525 Chicago Ave S Ste 32-1403, Minneapolis, MN 55404 USA
[3] Univ Texas Hlth Sci Ctr Houston, Biostat Epidemiol Res Design Core, Ctr Clin & Translat Sci, 6431 Fannin St,2-130B, Houston, TX 77030 USA
[4] Univ Southern Calif, Dept Radiol, 1200 N State St,D&T-3D321, Los Angeles, CA 90033 USA