1. Institute for Diagnostic and Interventional RadiologyJohann Wolfgang Goethe‐University FrankfurtFrankfurt Germany
2. Department of RadiologyFaculty of Medicine, Alexandria UniversityAlexandria Egypt
3. IBMMJohann Wolfgang Goethe‐University FrankfurtFrankfurt Germany
4. Division of GastroenterologyFirst Department of Internal MedicineJohann Wolfgang Goethe‐University FrankfurtFrankfurt Germany