An unusual case of Crohn's disease with unresponsive pleural exudates. Is Crohn's disease finally a systemic immunological disorder? - Papathanasopoulos, Athanasios A.; Katsanos, Konstantinos H.; Christodoulou, Dimitrios K.; Nikas, Spyridon; Tsianos, Epameinondas V. (Journal of Crohn's & Colitis, 2007)