1. First Propedeutic Department of Internal Medicine, Medical School Aristotle University of Thessaloniki, AHEPA University Hospital Thessaloniki Greece
2. Department of Internal Medicine, Faculty of Medicine, School of Health Sciences University of Thessaly Larissa Greece
3. Department of Internal Medicine, Medical School University of Ioannina, University Hospital of Ioannina Ioannina Greece
4. Laboratory of Medical Informatics Aristotle University of Thessaloniki Thessaloniki Greece