Determination of immunity T-cell link state and content of cancer stem cells as criterion to estimate efficiency of preventive breast cancer therapy with cryopreserved fetal liver cells - A. M. Holtsev; M. O. Bondarovych; A. V. Kuzniakov; M. V. Ostankov; L. V. Ostankova; O. V. Chelombitko (Problems of cryobiology and cryomedicine, 2014)