[1] Univ Cambridge, Strangeways Res Lab, Dept Publ Hlth & Primary Care, Canc Res UK,Genet Epidemiol Unit, Cambridge CB1 8RN, England
[2] Mayo Clin & Mayo Fdn, Dept Hlth Sci Res, Rochester, MN 55905 USA
[3] Stanford Univ, Sch Med, Dept Hlth Res & Policy, Stanford, CA 94305 USA
[4] Johns Hopkins Med Inst, James Buchanan Brady Urol Inst, Baltimore, MD 21205 USA