Zippi, M.; De Quarto, A.; Marzano, C.; Cassieri, C.; Crispino, P.; Traversa, G.; Occhigrossi, G.; Gnerre, P.; Terracina, D. Severe Gastrointestinal Bleeding Due to Erlotinib and Celecoxib Therapy: Additional Effect?. Ital J Med 2016, 11, 75-77.