aDigestive Disease Research Center, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
bThe Tisch Cancer Institute and Institute for Transitional Epidemiology, Mount Sinai School of Medicine, New York, New York
cDepartment of Epidemiology, Harvard School of Public Health, Boston, Massachusetts
dDepartment of Public Health Analysis, School of Community Health and Policy, Morgan State University, Baltimore
eDivision of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
fDepartment of Medical Epidemiology and Biostatistics, Karolinska Institute, Stockholm, Sweden
gDepartment of Public Health and Primary Care, University of Cambridge, Cambridge, UK
hInternational Prevention Research Institute, Lyon, France
iResearch Center for Gastroenterology and Hepatology, Golestan University of Medical Sciences, Gorgan, Iran
All supplementary digital content is available directly from the corresponding author.
Correspondence to Farhad Islami, MD, PhD, The Tisch Cancer Institute and Institute for Transitional Epidemiology, The Mount Sinai School of Medicine, One Gustave L. Levy Place, P.O. Box 1057, New York, 10029 NY, USA Tel: +1 212 659 5556; fax: +1 212 996 0407; e-mail: farhad.islami@mssm.edu
Received October 25, 2012
Accepted October 31, 2012
