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David Polzin, DVM, ’81 PhD, DACVIM, St. Paul, died on September 25, 2024, at age 72. During his 54-year academic career as a professor and division head of Internal Medicine at the University of Minnesota, he was celebrated as a world-renowned veterinary nephrologist and authored more than 200 papers, reviews, abstracts, editorials, books, and book chapters. Polzin also was a founding member of the International Renal Interest Society and was instrumental in the creation of the newly recognized American College of Veterinary Nephrology and Urology. He is survived by his wife, Brenda; his daughters, Kelsey, Cathy, and Christine; sons, Elliot and Brian; his brother, Chris; and eight grandchildren.