Filgotinib to Treat Acute Severe Refractory Ulcerative Colitis: A Case Report and Review of the Literature. - Vespere, Giuliana; Sedda, Silvia; Madonna, Pasquale; Abete, Roberta; D'Avino, Alfredo; Maione, Manuela; Lugarà, Marina; Tazza, Antonietta; Scaldaferri, Franco; Vitiello, Giuseppe; De Luca, Leonardo (Case Reports in Gastroenterology, 2025)