1. Department of Nephrology, Hippokration Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
2. Therapeutiki Hemodialysis Unit, Thessaloniki, Greece
3. Pieria Hemodialysis Unit, Katerini, Greece
4. Hemodialysis Unit, Achillopouleion General Hospital, Volos, Greece
5. Section of Nephrology and Hypertension, 1st Department of Medicine, AHEPA Hospital, Aristotle University of Thessaloniki, Thessaloniki, Greece
6. Department of Medicine, American Society of Hypertension Comprehensive Hypertension Center, The University of Chicago Medicine, Chicago, IL, USA
7. Department of Cardiovascular, Neural and Metabolic Sciences, IRCCS S.Luca Hospital, Istituto Auxologico Italiano, Milan, Italy
8. Department of Medicine and Surgery, University of Milan-Bicocca, Milan, Italy