Model 1 was built using three proteins previously identified as potential biomarkers of breast cancer in blood and/or tissue: Cofilin 1 (CFL1, LGGSAVISLEGKPL), Alpha-2-HS-glycoprotein (AHSG, HTFMGVVSLGSPSGEVSHPR), and Filamin A (FLNA, SPFSVAVSPSLDLSK). Here, FLNA is linked to breast cancer.