HETEROGENEITY OF THE THYMUS EPITHELIOCYTES AND THEIR ULTRASTRUCTURE IN NEWBORN RATS WITH DISTURBED BALANCE OF GLUCOCORTICOIDS [GETEROGENNOST' ÉPITELIOTSITOV TIMUSA I IKH UL'TRASTRUKTURA U NOVOROZHDENNYKH KRYS PRI DISBALANSE GLIUKOKORTIKOIDOV.] ArticleTorbek B.E., Iurina N.A.Morfologiia (Saint Petersburg, Russia). Vol. 114. 1998. P.. 54-59