1. Department of Gastroenterology; Postgraduate Institute of Medical Education and Research; Chandigarh 160012 India
2. Department of Experimental Medicine and Biotechnology; Postgraduate Institute of Medical Education and Research; Chandigarh 160012 India
3. Department of General Surgery; Postgraduate Institute of Medical Education and Research; Chandigarh 160012 India
4. Department of Histopathology; Postgraduate Institute of Medical Education and Research; Chandigarh 160012 India
5. Department of Biochemistry; Panjab University; Chandigarh India