1. Department of Gastroenterology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
2. Department of Pathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India
3. Department of Radiodiagnosis and Imaging, Post Graduate Institute of Medical Education and Research, Chandigarh, India
4. Department of Medical and Surgical Sciences, University of Foggia, Foggia, Italy