[1] NCI, Div Canc Control & Populat Sci, Bethesda, MD 20892 USA
[2] NCI, Off Workforce Dev, Bethesda, MD 20892 USA
[3] City Hope Natl Med Ctr, Div Etiol, Dept Populat Sci, Duarte, CA USA
[4] Ctr Dis Control & Prevent, Off Publ Hlth Genom, Atlanta, GA USA