Spearman rank order correlation coefficient between TGF-β1, CTGF, Col1
and Col3. A strong positive correlation were found between TGF-β1 and
CTGF(A), moderate positive correlation between Col3 and TGF-β1 (B), Col3
and CTGF (C), low positive correlation between Col1 and TGF-β (D) and
Col1, and CTGF (E).