1. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
2. Department of Epidemiology, Shanghai Cancer Institute, Shanghai, China
3. Division of Epidemiology, Department of Medicine, School of Medicine, Vanderbilt University, Nashville, Tennessee, USA
4. National Cancer Control Institute, National Cancer Center, Goyang, Korea