Genetic variants in PTGS1 and NOS3 genes increase the risk of upper gastrointestinal bleeding: a case–control study - Forgerini, Marcela; Urbano, Gustavo; Nadai, Tales Rubens de; Batah, Sabrina Setembre; Fabro, Alexandre Todorovic; Mastroianni, Patrícia de Carvalho (Frontiers in Pharmacology, 2021)