Tacrolimus maternal blood : plasma (n = 7), venous umbilical cord blood : plasma (n = 6) concentration ratios in patients, taking tacrolimus at the time of delivery (A) and the calculated Kbc/p, the tacrolimus partitioning ratio between blood cells and plasma, in maternal blood (n = 7) and venous umbilical cord blood (n = 6) (B). The horizontal lines represent the mean ratios. A) □, maternal blood : maternal plasma; ▴, venous cord blood : venous cord plasma; B) □, maternal blood Kbc/p; ▴, Venous Cord Blood Kbc/p