. "John Callaghan"@en . "2004-04-06Z"^^ . . "1923Z"^^ . "John Carter Callaghan, OC AOE (October 1, 1923 \u2013 April 6, 2004) was a Canadian cardiac surgeon who \"pioneered open-heart surgery in Alberta\" Born in Hamilton, Ontario on October 1, 1923, he received his medical degree from the University of Toronto in 1946. In 1955, he joined the Division of Cardiovascular and Thoracic Surgery at the University of Alberta Hospital and performed Canada\u2019s first successful open heart surgery.In 1985, he was made an Officer of the Order of Canada."@en . "Canadian cardiac surgeon" . . "2004Z"^^ . "John Carter Callaghan"@en . "Callaghan, John"@en . "1923-10-01Z"^^ . .