NR2F6 and neoplasm: Challenging Nr2f6+/+ and Nr2f6−/− mice with a high tumor load of 5×105 B16-OVA or 7.5×105 MC38 colon carcinoma cells, all wild-type mice receiving control IgG injections rapidly developed tumors and had to be sacrificed due to ethical reasons at the latest by d21 post injection.