[1] Huntsman Canc Inst, 2000 Circle Hope Dr Room 4725, Salt Lake City, UT 84112 USA
[2] Univ Utah, Dept Populat Hlth Sci, Salt Lake City, UT USA
[3] Univ Clin Heidelberg, Dept Surg, Heidelberg, Germany
[4] German Canc Res Ctr, Div Prevent Oncol, Heidelberg, Germany
[5] Natl Ctr Tumor Dis, Heidelberg, Germany