This clinical trial is a longitudinal study designed to evaluate the safety and efficacy for subjects with Autism Spectrum Disorder (ASD) who received Magnetic EEG/ECG-Guided Resonance Therapy (MeRT) in the IRB approved clinical trial. A total of twenty-eight (28) subjects will be followed in this study. After providing informed consent, twenty-eight (28) subjects who participated in the previous protocol will be observed for up to three (3) years post-MeRT treatment. During this period, subjects will be evaluated at 104 and 156 weeks post-MeRT treatment.