of the exons of the respective genes, the only exception being a 100 kb deletion affecting NRXN1 exons 7-9 (DGV Variation_2383). This variant affects a different region from the variants observed here; in addition, it was found only in one out of 540 chromosomes and is therefore also not likely to represent a common population polymorphism. Overall, the size and position of the variants identified here, both in NRXN1 and COL8A1, do not show any overlap with common population polymorphism.
