TCF4 and Pitt-Hopkins syndrome: Rosenfeld J.A., Leppig K., Ballif B.C., Thiese H., Erdie-Lalena C.,Bawle E., Sastry S., Spence J.E., Bandholz A., Surti U., Zonana J.,Keller K., Meschino W., Bejjani B.A., Torchia B.S., Shaffer L.G.Genotype-phenotype analysis of TCF4 mutations causing Pitt-Hopkins syndrome shows increased seizure activity with missensemutations.