This initiative focuses on developing, implementing, and disseminating a survey to capture the treatment preferences of patients with Chronic Lymphocytic Leukemia (CLL) and to explore the factors shaping therapeutic decision-making. Initially rolled out in English-speaking European countries, the project aspires to expand across non-English-speaking countries worldwide. In collaboration with ERIC, the CLL Advocates Network (CLLAN), and the Lymphoma Coalition, the project will inform policy and practice through broad dissemination and recommendations. Our team designed the questionnaire from the ground up, combining extensive research with input from stakeholders, and we will oversee data collection, analysis, and the preparation of a white paper on treatment preferences in CLL.