[1] Univ Pittsburgh, Med Ctr, Dept Med, Pittsburgh, PA USA
[2] Univ Pittsburgh, Med Ctr, Dept Epidemiol, Pittsburgh, PA USA
[3] NCI, Canc Prevent Div, Bethesda, MD 20892 USA
[4] NCI, Div Canc Epidemiol & Genet, Bethesda, MD 20892 USA
[5] Pacific Hlth Res Inst, Honolulu, HI USA
[6] Marshfield Clin Fdn Med Res & Educ, Dept Hematol & Oncol, Marshfield, WI USA
[7] Univ Minnesota, Dept Hlth Studies Environm Hlth Sci, Minneapolis, MN USA
[8] Westat Corp, Dept Hlth Studies, Rockville, MD USA
[9] Informat Management Serv Inc, Rockville, MD USA