1 aHypertension Center STRIDE-7, Third University Department of Medicine, Sotiria Hospital, Athens bFirst Department of Pediatrics, P&A Kyriakou Children's Hospital, Athens cFirst Department of Pediatrics, Aristotle University, Hippokration Hospital, Thessaloniki dDepartment of Nephrology, Agia Sophia Children's Hospital eDepartment of Nephrology, P&A Kyriakou Children's Hospital, Athens, Greece.