TGF-β1 serum levels in controls, aged under and over 50 in relation to <i>TGFB1</i>-509 polymorphism.

<p>(A) Females over 50 (>50) compared to females under 50 (<50). (B) Males over 50 (>50) compared to males under 50 (<50). The results are presented as the mean value ±SE (box) with a ±0.95 confidential interval (whisker).The statistical significance of the U-test is shown as the p-value.