For DGS/VCFS, the primers used were DGCR2/TUPLE1 loci.     ///    "In all, 20 study patients were involved: 10 PWS/AS and 10 DGS/VCFS. "    ///    "Similarly, 6 of the 10 patients referred for DGS/VCFS showed deletion for the DGCR2/TUPLE1 loci on one chromosome 22. "