Dr. Hugh R. Butt, 98; explored clotting and anti-clotting techniques at Mayo Clinic
Monday, September 1, 2008 - 08:28
in Health & Medicine
Dr. Hugh R. Butt, the Mayo Clinic physician who discovered the role of vitamin K in clotting and developed anti-clotting techniques that paved the way for open-heart surgery and transplants, died Aug. 16 in Rochester, Minn.