ECM1 and Fibroadenoma: For fibroadenoma tissues, compared with both fibroadenoma-adjacent and normal tissues, there were six up-regulated (ANXA6, VCP, SERPINH1, galactosidase alpha, NNT, and MMP11) (Supplementary Table 7) and 38 down-regulated (KRT10, KRT1, ALDH1A1, ECM1, and others) (Supplementary Table 8) proteins in fibroadenoma.