Tolvaptan Treatment in Children with Chronic Hyponatremia due to Inappropriate Antidiuretic Hormone Secretion: A Report of Three Cases Journal title: Journal of Clinical Research in Pediatric Endocrinology Authors: Gerdi Tuli, Daniele Tessaris, Silvia Einaudi, Luisa De Sanctis, Patrizia Matarazzo Subject(s): Medicine, Internal Medicine, Pediatrics