CHEDDA syndrome is an underrecognized neurodevelopmental disorder with a highly restricted ATN1 mutation spectrum by Palmer, EE, Whitton, C, Hashem, MO, Clark, RD, Ramanathan, S, Starr, LJ, Velasco, D, De Dios, JK, Singh, E, Cormier‐Daire, V, Chopra, M, Rodan, LH, Nellaker, C, Lakhani, S, Mallack, EJ, Panzer, K, Sidhu, A, Wentzensen, IM, Lacombe, D, Michaud, V, Alkuraya, FS