1 Evidence-based Medicine Unit, Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece; Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, United Kingdom.
2 Evidence-based Medicine Unit, Department of Hygiene and Epidemiology, University of Ioannina School of Medicine, Ioannina, Greece; Department of Health Services, Policy and Practice, School of Public Health, Brown University, RI, USA.
3 Department of Internal Medicine, University Hospital of Ioannina, Ioannina, Greece.
4 School of Medicine, European University of Cyprus, Nicosia, Cyprus.
5 Department of Internal Medicine, University Hospital of Ioannina, Ioannina, Greece; School of Medicine, European University of Cyprus, Nicosia, Cyprus. Electronic address: vagrizos@gmail.com.