The control subjects used were drawn from Affymetrix 6.0 genotyped subjects from the NIMH genetics repository collected through the United States nationally representative survey panel. Participants were screened for psychosis and bipolar disorder. Control participants were not screened for ADHD. Control participants gave written consent for their biological materials to be used for medical research at the discretion of NIMH. Controls were genotyped using the Affymetrix 6.0 array at the Broad Institute National Center for Genotyping and Analysis. Genotype calls were made with the BIRDSEED program, a module of the BIRDSUITE package.
