1 First Department of Internal Medicine, AHEPA University Hospital, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece.
2 Basic and Translational Research Unit (BTRU) of Special Unit for Biomedical Research and Education (BRESU), Faculty of Health Sciences, School of Medicine, Aristotle University of Thessaloniki, 54636 Thessaloniki, Greece.
3 First Department of Internal Medicine, University Hospital of Alexandroupolis, Democritus University of Thrace, 68100 Alexandroupolis, Greece.
4 Department of Physiology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece.
5 University Department of Internal Medicine, General and Oncology Hospital of Kifisia Agioi Anargyroi, 14564 Athens, Greece.