“Treatment of atrial myocytes … patient with SR with human recombinant MIF (rMIF) (40 nM, 1 h) … to depress I(Ca, L ) amplitudes, while mouse rMIF (20 or 40 nM, 24 h) suppressed peak I(Ca,… HL-1 cells by approximately 69% and approximately 83% in a concentration-dependent manner.”