1. Department of Nephrology, School of Medicine, University of Thessaly, Larissa, Greece.
2. Department of Nephrology and Hypertension, Endocrinology and Metabolic Diseases, Otto-von-Guericke University Magdeburg, Magdeburg, Germany.
3. Department of Neurology, School of Medicine, University of Thessaly, Larissa, Greece.
4. Universitätsklinik für Nephrologie, Hypertonie und Klinische Pharmakologie, Inselspital, Bern, Schweiz.
5. Department of Biomathematics, School of Medicine, University of Thessaly, Larissa, Greece.
6. Institute for Clinical Research and Health Policy Studies, Tufts University School of Medicine, Boston, Massachusetts.