The road to a world-unified approach to the management of patients with gastric intestinal metaplasia: a review of current guidelines by Dinis-Ribeiro, M, Shah, S, El-Serag, H, Banks, M, Uedo, N, Tajiri, H, Coelho, LG, Libanio, D, Lahner, E, Rollan, A, Fang, J, Moreira, L, Bornschein, J, Malfertheiner, P, Kuipers, EJ, El-Omar, EM