The MECP2 variant c. 925C>T (p. Arg309Trp) causes intellectual disability in both males and females without classic features of Rett syndrome. - Schönewolf‐Greulich, B.; Tejada, M.‐I.; Stephens, K.; Hadzsiev, K.; Gauthier, J.; Brøndum‐Nielsen, K.; Pfundt, R.; Ravn, K.; Maortua, H.; Gener, B.; Martínez‐Bouzas, C.; Piton, A.; et al. (Clinical Genetics, 2016)