ACTA1 and pemphigus foliaceus: As shown in Figures 3(a)–3(c), endometriotic PF enhanced the expression of collagen I, α-SMA, fibronectin, and CTGF in endometrial MSCs more significantly than control PF, indicating that endometriotic PF could strongly induce endometrial MSCs to differentiate into myofibroblasts.