Rasmussen, M. B., Chen, I. M., Johansen, J. S., Theile, S., Markussen, A., Christensen, T. D., Karsdal, M. A., Willumsen, N. (2026). Extracellular matrix-derived liquid biopsy for predicting response in patients with biliary tract cancer treated with nivolumab with or without ipilimumab combined with stereotactic body radiotherapy: Insights from the CheckPAC trial.. Journal of Clinical Oncology. https://doi.org/10.1200/jco.2026.44.16_suppl.3043