BRCA1 and neoplasm: Analysis of tumors after removal of an outlier p18−/−;Brca1+/− tumor, a p18+/− tumor and an outlier p18−/− sample, revealed that Tgfβr2 mRNA levels in p18−/−;Brca1+/− tumors were significantly higher than those in p18−/− tumors (Fig. S2).