Chang, A., Pelletier, A. N., McGuire, D. J., Tsagiopoulou, M., Karipidou, M., Ayers, A., Leal, A. M. K., Churnetski, M. C., O’Leary, C. B., Switchenko, J. M., Davis, C., Frank, D. A., Koff, J. L., Cohen, J. B., Sekaly, R. P., Stamatopoulos, K., Flowers, C. R., Ahmed, R. (2025). PD-1 expression identifies proliferating malignant CLL B cells and is a potential biomarker of response to BTK inhibitor therapy. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.2426935122