For example, the duplication of exons 3–7 in DMD was incidentally identified by array comparative genomic hybridization in a girl without a family history of DMD, who was affected by cystic fibrosis and maturity-onset diabetes of the young type 5 (MODY5) due to a classical 17q12 microdeletion (Nguyen et al., 2015). Here, DMD is linked to cystic fibrosis.