Cost-effectiveness of Prophylaxis Against Pneumocystis jiroveci Pneumonia in Patients with Crohn's Disease. - Okafor, Philip; Farraye, Francis; Okafor, Adetoro; Erim, Daniel; Okafor, Philip N; Farraye, Francis A; Okafor, Adetoro T; Erim, Daniel O (Digestive Diseases & Sciences, 2015)