[1] Univ Calif San Francisco, San Francisco, CA 94143 USA
[2] Univ Lausanne, Lausanne, Vaud, Switzerland
[3] Kaiser Permanente Div Res, Oakland, CA USA
[4] German Canc Res Ctr, Div Prevent Oncol, Heidelberg, Baden Wurttembe, Germany
[5] Natl Ctr Tumor Dis NCT, Heidelberg, Baden Wurttembe, Germany
[6] German Canc Res Ctr, Heidelberg, Baden Wurttembe, Germany
[7] Kaiser Permanente Northern Calif, San Francisco, CA USA