ADHD ASD Avon Longitudinal Study of Parents and Children (ALSPAC) DNA methylation EEG Eating Attitudes Test-26 (EAT-26) Humanities MRS MUPS N-acetylaspartate NAA Receiver Operating Characteristics (ROC) curve analysis Social interaction accelerometry acyl-ghrelin adolescence alcohol and/or drug abuse animal models anorexia anorexia nervosa attention attention-deficit/hyperactivity disorder autism binge eating disorders body anxiety body image disturbances body mass index body-related attentional bias bulimia bulimia nervosa