Spectral Karyotyping and SNP Microarray Analysis Define Uniparental Disomy (UPD) as a Novel Mutational Mechanism in MSI- and CSI-Colorectal Cancers - Ralph Melcher; Waltraud Zopf; Elena Hartmann; Andreas Rosenwald; Holger Hoehn; Michael Schmid; Theodor Kudlich; Michael Scheurlen; Hardi Luehrs (Cellular Oncology)