ACTA1 and endometriosis: Thus, we investigated the effects of varying doses of IL-1β and/or TNFα (supplementary Note, supplementary Methods, supplementary Results, supplementary Fig. S1) on cell proliferation, cell migration, collagen gel contraction, mRNA and/or protein expression of collagen type I (Col I), matrix metalloproteinase-1 (MMP-1), and alpha smooth muscle actin (αSMA), which are commonly used methods for evaluating fibrosis4–12, in endometriotic and menstrual endometrial stromal cells of patients with endometriosis.