Correction: Tay-Sachs Disease: Two Novel Rare HEXA Mutations from Pakistan and Morocco - Bibi, Farah; Ullah, Asmat; Bourinaris, Thomas; Efthymiou, Stephanie; Kriouile, Yamna; Sultan, Tipu; Haider, Shahzad; Salpietro, Vincenzo; Houlden, Henry; Kaukab Raja, Ghazala (Klinische Pädiatrie, 2021)