Affiliation: | a1st Department of Internal Medicine and Hepato-Gastroenterology Unit, Medical School, University of Ioannina, 451 10, Ioannina, Greece;bDepartment of Pathology Medical School, University of Ioannina, 451 10 Ioannina, Greece;cDepartment of Ophthalmology Medical School, University of Ioannina, 451 10 Ioannina, Greece |