ACTA1 and renal fibrosis: Regarding outcome measures, Scr levels were reported in 25 studies; BUN levels in 22 studies; TGF-β1 levels in 12 studies; α-SMA levels in 8 studies; 24-h urinary protein levels in 10 studies; KWI in 14 studies; renal fibrosis area in 8 studies; Collagen I in 5 studies; Collagen IV levels in 6 studies; FN levels in 8 studies; E-cadherin levels in 4 studies; KIM-1 levels in 3 studies; and renal injury scores in 5 studies.