Slowing-down of irreversible age thymus atrophy rate by means of auto-transplantation of long-lastingly cryopreserved thymus - A. V. Kulikov; G. N. Smirnova; L. V. Arkhipova; D. A. Kulikov; N. V. Shishova (Problems of cryobiology and cryomedicine, 2008)