1. From the Hospital for Sick Children, Toronto, Ontario, Canada; Memorial Sloan-Kettering Cancer Center, New York, NY; University of Chicago Pritzker School of Medicine, Chicago, IL; St Jude Children's Research Hospital, Memphis, TN; Dana-Farber Cancer Institute and Harvard School of Public Health, Boston, MA; University of California, Los Angeles; and Alcohol Research Group, Emeryville, CA.