Cleveland Browns owners Dee and Jimmy Haslam have committed a significant $12.5 million to blood cancer research and treatment, a cause deeply personal for Dee Haslam following her 2021 chronic lymphocytic leukemia (CLL) diagnosis. The donation includes includes $10 million to the Oxford-Harrington Rare Disease Centre in England for research and drug development focused on chronic lymphocytic leukemia (CLL) and other rare blood cancers. The other $2.5 million will go to Cleveland's University Hospitals Seidman Cancer Center, which will establish an endowed chair in CLL research and an innovation fund toward driving advancements in care. "I am extremely grateful that I am living a full, healthy life after being diagnosed with CLL in 2021," Dee Haslam said in a statement. "Together with UH Seidman Cancer Center and the Oxford-Harrington Centre, we hope to increase knowledge of CLL, generate new treatments and give others the confidence and information they need to navigate the disease.…