| Recruiting | N/A | 202 | US | EEG and Auditory and Visual Evoked Potentials (AEP and VEP), Clinical assessment | Children's Hospital of Philadelphia, National Institute of Neurological Disorders and Stroke (NINDS), Vanderbilt University Medical Center | Rett Syndrome, RTT, Rett Syndrome, Atypical | 03/28 | 03/29 | | |