Longitudinal monitoring of disease burden and response using ctDNA from dried blood spots in xenograft models oleh Carolin M Sauer, Katrin Heider, Jelena Belic, Samantha E Boyle, James A Hall, Dominique‐Laurent Couturier, Angela An, Aadhitthya Vijayaraghavan, Marika AV Reinius, Karen Hosking, Maria Vias, Nitzan Rosenfeld, James D Brenton