[1] Univ Hawaii, Honolulu, HI 96822 USA
[2] Univ Calif San Francisco, San Francisco, CA 94143 USA
[3] Univ Rhode Isl, Canc Prevent Res Ctr, Kingston, RI 02881 USA
[4] Univ Kentucky, Lexington, KY USA
[5] NCI, Div Canc Control & Populat Sci, Bethesda, MD 20892 USA
[6] Columbia Univ, Teachers Coll, Hlth & Behav Studies, New York, NY 10027 USA