The Mayo Clinic, "Crohn's Disease - Treatments and Drugs" Mayoclinic, Treatment and Drugs, August 13, 2014 The Mayo Clinic, "Crohn's Disease - Treatments and Drugs" as many as half medications used to treat IBD «Crohn's disease - Diagnosis and treatment - Mayo Clinic» pharmaceutical drugs doctors prescribe treatment of Crohn’s disease The Mayo Clinic, "Crohn's Disease - Treatments and Drugs"