Biodistribution of radiolabeled pd-VWF. Radiolabeled pd-VWF (5 μg/mouse) was injected intravenously into VWF-deficient mice. After 30 minutes, mice were killed and organs were collected. Indicated organs were weighed and residual radioactivity was analyzed. This allowed us to calculate the percentage of radioactivity present in the individual organs relative to the total amount of radioactivity injected (percentage of injected). The relative uptake was then determined as the ratio of the percentage of injected over organ weight (percentage of injected/mg tissue). Data represent mean values plus or minus SEM of 3 mice.