- Frequent loss of imprinting of PEG1/MEST in invasive breast cancer. Pedersen, I.S., Dervan, P.A., Broderick, D., Harrison, M., Miller, N., Delany, E., O'Shea, D., Costello, P., McGoldrick, A., Keating, G., Tobin, B., Gorey, T., McCann, A. Cancer Res. (1999)