[1] Univ Michigan, Taubman Ctr, Michigan Med, B1-141,1500 E Med Ctr Dr,SPC 5302, Ann Arbor, MI 48109 USA
[2] Harborview Med Ctr, Seattle, WA USA
[3] Yale Univ, Sch Med, Dept Radiol & Biomed Imaging, New Haven, CT USA
[4] Penn State Coll Med, Penn State Milton S Hershey Med Ctr, Dept Radiol, Hershey, PA USA
[5] Madigan Army Med Ctr, Dept Diagnost Radiol, Tacoma, WA 98431 USA
[6] Univ Souther Calif, Keck Sch Med, Los Angeles, CA USA
[7] Summit Hlth, Dept Radiol, Chambersburg, PA USA
[8] Emory Univ, Dept Radiol & Imaging Serv, Johns Creek, GA USA