SERPINF1 and melanoma: The B16-LS9 melanoma cell line was inoculated into the posterior compartment of wild type C57BL/6 J mice (WT), C57BL/6 J mice treated with anti-asialo GM1 serum to deplete NK cells (NK-depleted) and PEDF−/− C57BL/6 J mice (PEDF−/−).