Losses of 1p, 4p, 4q, 8p, 9p, 9q, 13q, 14q and 18q correlate with higher grade and/or stage of the tumors <ref>Zhang et al, Adv Bioinform, 2010 | Losses of 1p, 4p, 4q, 8p, 9p, 9q, 13q, 14q and 18q correlate with higher grade and/or stage of the tumors <ref>Zhang et al, Adv Bioinform, 2010 |