Red meat, dietary nitrosamines, and heme iron and risk of bladder cancer in the European Prospective Investigation into Cancer and Nutrition (EPIC). por Jakszyn, P, González, C, Luján-Barroso, L, Ros, M, Bueno-de-Mesquita, H, Roswall, N, Tjønneland, A, Büchner, F, Egevad, L, Overvad, K, Raaschou-Nielsen, O, Clavel-Chapelon, F, Boutron-Ruault, M, Touillaud, MS, Chang-Claude, J, Allen, N, Kiemeney, L, Key, T, Kaaks, R, Boeing, H, Weikert, S, Trichopoulou, A, Oikonomou, E, Zylis, D, Palli, D