Ultrastructure of Nucleated Cells of Cord Blood and Blood of Adult Donors at Different Stages of Cryopreservation. Report 1. The Changes on the Stage of Cells Isolation - L. A. Babijchuk; R. K. Migunova; O. F. Nevzorova; V. P. Nevzorov (Problems of cryobiology and cryomedicine, 2012)