title: True blue: a puzzling case of persistent cyanosis in a young child.
authors.affiliation: Department of Pediatrics, Faculty of Medicine, University of Toronto, Toronto, Ontario.
authors.forename: Michelle
authors.initials: M
authors.lastname: Porepa
authors.forename: Lee
authors.initials: L
authors.lastname: Benson
authors.forename: David E
authors.initials: DE
authors.lastname: Manson
authors.forename: Jeremy N
authors.initials: JN
authors.lastname: Friedman