[1] Department of Radiology,
[2] University of Minnesota Medical School & Hennepin County Medical Center,undefined
[3] Mayo Mail Code 292,undefined
[4] 420 Delaware Street SE,undefined
[5] Minneapolis,undefined
[6] MN 55455,undefined
[7] USA e-mail: casey021@tc.umn.edu Tel.: + 1-6 12-2 73 40 92 Fax: + 1-6 12-2 73 84 95,undefined