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Results are presented as concentrations of PDGF-AB, IGF-1, TGF-ß1 (a), and bFGF, VEGF and EGF (b), (individual values and means of dosages in n = 11 units of PR-hPL and their respective hPL controls). **: p<0.01 hPL versus PR-hPL (Student’s t-test).
