Allelic losses at 1p, 9q, 10q, 14q, and 22q in the progression of aggressive meningiomas and undifferentiated meningeal sarcomas - Lamszus, K; Kluwe, L; Matschke, J; Meissner, H; Laas, R; Westphal, M (Cancer Genet Cytogenet, 1999)