[1] Emory Univ, Sch Med, Childrens Healthcare Atlanta, Aflac Canc & Blood Disorders Ctr, Atlanta, GA USA
[2] Ctr Dis Control & Prevent, Canc Surveillance Branch, Atlanta, GA 30341 USA
[3] Ctr Dis Control & Prevent, Comprehens Canc Control Branch, Atlanta, GA 30341 USA
[4] Ctr Dis Control & Prevent, Natl Ctr Chron Dis Prevent & Hlth Promot, Div Canc Prevent & Control, Epidemiol & Appl Res Branch, Atlanta, GA 30341 USA
[5] Ctr Dis Control & Prevent, OSELS, Atlanta, GA 30341 USA