title: Patent ductus arteriosus in a Holstein calf: A two-dimensional and Doppler echocardiographic study of the ductus arteriosus and validation.
authors.forename: M R
authors.initials: MR
authors.lastname: O'grady
authors.forename: J R
authors.initials: JR
authors.lastname: Cockshutt
authors.forename: A
authors.initials: A
authors.lastname: Khanna
authors.forename: H J
authors.initials: HJ
authors.lastname: Kloeze
authors.forename: A M
authors.initials: AM
authors.lastname: Hoffman
authors.forename: L
authors.initials: L
authors.lastname: Viel