Table 1. Overview of the clinical samples from six published GWASs of ASDs^{11, 12, 13, 14, 15, 16}.

GWAS	Clinical sample	Genotyping platform	Phenotype	Diagnosis
Wang et al.11	Combined discovery sample (AE): AGRE (943 families) a + ACC cohort (1453 cases and 7070 controls) from CHOP and several other US clinical sites	Illumina	ASD	ADOS+ADI-R
Ma et al.12	CAP discovery sample (AE): four US clinical sites (438 families)	Illumina	Autism	ADI-R+DSM-IV
Weiss et al.13	Combined discovery sample (AE), consisting of 1031 multiplex families with 1553 affected offspring from: AGRE (801 families) a + NIMH (341 families)	Affymetrix	ASD	ADI-R
Salyakina et al.14	Combined sample: discovery sample from two US clinical sites (124 families) + AGRE validation sample (110 families)	Illumina	ASP	ADI-R+DSM-IV
Hussman et al.15	Combined sample: sample from two US clinical sites (597 families) + AGRE sample (696 families)	Illumina	Autism	ADI-R+DSM-IV
Anney et al.16	AGP Consortium discovery sample (AE): Autism (809 families) + ASD (1369 families)	Illumina	Autism+ASD	ADOS+ADI-R

Abbreviations: ACC, Autism Case Control; ADOS, Autism Diagnostic Observation Schedule; ADI-R, Autism Diagnostic Interview-Revised; AE, all ethnicities; AGP, Autism Genome Project; AGRE, Autism Genetic Resource Exchange; ASD, autism spectrum disorder; ASP, Asperger's syndrome; CAP, Collaborative Autism Project; CHOP, Children's Hospital of Philadelphia; DSM-IV, Diagnostic and Statistical Manual of Mental Disorders-fourth edition; GWAS, genome-wide association study; NIMH, National Institute for Mental Health.

^aThere is considerable overlap between these two clinical samples.^{11, 13}