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Effect of age and hypoxic stimulation on anti-angiogenic factors gene expression. Expression levels of ENDS (A), PAI (B) and TBS1 (C) were measured using qRT-PCR. Animal groups consisted of young (1-3 month, 16 animals), aged (18 months, 9 animals) and old mice (24 months, 7 animals). Results are means of different animals (* = p < 0.05, ** = p < 0.01, *** = p < 0.001).
