VNTR polymorphism in intron 4 of the enos gene and the risk of gastrointestinal bleeding: a case-control study - Forgerini, Marcela; Urbano, Gustavo; Nadai, Tales Rubens de; Zanelli, Cleslei Fernando; Valentini, Sandro Roberto; Mastroianni, Patrícia de Carvalho (Journal of Gastrointestinal and Liver Diseases, 2022)