[1] Univ Minnesota, Div Epidemiol & Clin Res, Minneapolis, MN USA
[2] Univ Minnesota, Masonic Canc Ctr, Minneapolis, MN USA
[3] Univ Southern Calif, Dept Preventat Med, Keck Sch Med, Norris Comprehens Canc Ctr, Los Angeles, CA 90007 USA
[4] Univ Hawaii, Ctr Canc, Program Epidemiol, Honolulu, HI 96822 USA