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TGF-β1 secretion. TGF-β1 secretion was measured from conditioned medium by ELISA. RAFT TE constructs contained either normal hLF (black bars) or dFib (gray bars). Conditioned medium was collected from RAFT TEs with or without hLE from nonairlifted and airlifted (AL) RAFT TEs. *p<0.05. n=3±SD. TGF-β1, transforming growth factor-β1.
