Reply to the letter to the editor

Carlos A. Gonz alez*, Guillem Pera, Antonio Agudo, Domenico Palli, Jakob Linseisen, Heiner Boeing, Mazda Jenab, H. Bas Bueno-de-Mesquita, Mattijs E. Numans and Elio Riboli, on behalf of the EPIC-EUR-GAST study Department of Epidemiology, Catalan Institute of Oncology (ICO-IDIBELL), Barcelona, Spain Molecular and Nutritional Epidemiology Unit, CSPO-Scientific Institute of Tuscany, Florence, Italy Division of Clinical Epidemiology, Deutsches Krebsforschungszentrum, Heidelberg, Germany German Institute of Human Nutrition, Potsdam-Rehbr€ ucke, Germany Nutrition and Hormones Group, International Agency for Research on Cancer, Lyon, France Cancer Epidemiology, Center for Nutrition and Health, National Institute for Public Health and the Environment, Bilthoven, The Netherlands Julius Center for Health Sciences and Primary Care, University Medical Center, Utrecht, The Netherlands Cancer Epidemiology and Prevention, Department of Epidemiology and Public Health, Faculty of Medicine, Imperial College London, London, United Kingdom