Highly Cited Researchers demonstrate significant and broad influence in their field(s) of research and represent 1 in 1,000 scientists and social scientists worldwide. James (Jim) Gern, MD, professor, Division of Allergy, Immunology, and Rheumatology, and vice chair of research for the Department of Pediatrics, was among the 19 researchers from UW–Madison who were named to Clarivate’s list of Highly Cited Researchers 2025.