Adjunctive hyperbaric oxygen therapy in refractory Crohn’s disease: an observational study - Feitosa, Marley Ribeiro; Parra, Rogério Serafim; Machado, Vanessa Foresto; Vilar, Gustavo Nunes; Aquino, Jussara Costa; Rocha, José Joaquim Ribeiro da; Kotze, Paulo G.; Féres, Omar (Gastroenterology Research and Practice, 2021)