Novel NFIX variant in a patient with Malan syndrome and associated Chiari type I malformation: a case report. - Minerva M; Pinto AM; Toninelli F; Francioni A; Perilli L; Laschi E; Lonoce L; Lotti F; Curcio MR; Fallerini C; Renieri A; Grosso S (Frontiers in pediatrics, 2026)