Deletions or duplications of the region 15q11q13 are rare genetic copy number variations that have an increased risk of neuropsychiatric disorders. The most reported breakpoints are between chr15:29161368-30375967 (BP3-4) or chr15:29161368-32462776 (BP 3-5) (GRCh37). The chromosomal positions are taken from Kirov et al. 2014. 10.1016/j.biopsych.2013.07.022 and literature cited there.