COL3A1 and Myocardial fibrosis: The members of the collagen family related to myocardial fibrosis were also involved, such as collagen alpha-1(I) chain (COL1A1, degree = 1), collagen alpha-2(I) chain (COL1A2, degree = 1), and collagen alpha-3(I) chain (COL3A1, degree = 1).