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00232_2_Schermata01-2457417alle152028
Jay Maclean (1880-1957) (left and center) and William Henry Howell (1860-1945) (right) From: Baird RJ. (1992) The story of heparin – as told through sketches from the lives of William Howell, Jay Maclean, Charles Best and Gordon Murray. J Vasc Surg 11: 4-18