(cCNVRs), which occur at >1% frequency, and then classified the CNV call as common or rare by the scan_region.pl program: if >50% of a CNV call overlaps with a cCNVR, it is referred to as a common CNV. The comparison of number of CNV calls in case versus control subjects was performed by t test, while the comparison of fraction samples with large CNVs was performed by the Fisher exact test.