Morris, V. K., Ciombor, K. K., Xiao, L., Ochieng, J. K., Marmonti, E., Polite, B., Weinberg, B. A., Krauss, J. C., Hays, J., Mukherjee, S., Aranha, O., Iqbal, S., Shields, T., Benson, A. B., Kazmi, S., Lieu, C., Hochster, H., Whisenant, J., Haymaker, C., Eng, C. (2026). NCI9673 (Part B): ETCTN Randomized Phase II Study of Nivolumab With or Without Ipilimumab in Refractory, Metastatic Squamous Cell Carcinoma of the Anal Canal. Journal of Clinical Oncology. https://doi.org/10.1200/jco-25-00929