[1] Roswell Pk Canc Inst, Dept Canc Prevent & Control, Buffalo, NY 14263 USA
[2] Univ Florida, Dept Epidemiol, 2004 Mowry Rd,4th Floor,POB 100231, Gainesville, FL 32610 USA
[3] Fred Hutchinson Canc Res Ctr, SWOG Stat Ctr, 1124 Columbia St, Seattle, WA 98104 USA
[4] Univ Calif Davis, Dept Internal Med, Ctr Comprehens Canc, Sacramento, CA USA
[5] Columbia Univ, Dept Environm Hlth Sci, New York, NY USA
[6] Loyola Univ Chicago, Stritch Sch Med, Maywood, IL USA