Dietary intake of heme iron and risk of gastric cancer in the European prospective investigation into cancer and nutrition study por Jakszyn, P, Agudo, A, Lujan-Barroso, L, Bueno-de-Mesquita, H, Jenab, M, Navarro, C, Palli, D, Boeing, H, Manjer, J, Numans, M, Igali, L, Boutron-Ruault, M, Clavel-Chapelon, F, Morois, S, Grioni, S, Panico, C, Tumino, R, Sacerdote, C, Quirós, JR, Molina-Montes, E, Ma Huerta Castaño, J, Barricarte, A, Amiano, P, Khaw, K, Wareham, N