Title:
Study of Treat to Treat Versus Routine Care Maintenance Strategies in Crohn’s Disease Patients treated with Ustekinumab: Ultrasound Substudy Study

Conductor: Prof. T. Kucharzik (Lüneburg, Germany)
Organization through the German office Competence Network-BD (K. Fitzke).
Patients: Patient number: max. 90, min. 60 Multicentric, with the participation of European study centers in:

• Denmark (3)
• Germany (7)
• Spain (4)
• Italy (9)
• Netherlands (2)
• Slovakia (3)
• Czech Republic(3)