title: Did referral patterns for coronary angiography change in Europe? What can we learn from Denmark?
authors.affiliation: Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Waehringer Guertel 18-20, Vienna 1090, Austria.
authors.forename: Lorenz
authors.initials: L
authors.lastname: Koller
authors.affiliation: Division of Cardiology, Department of Internal Medicine II, Medical University of Vienna, Waehringer Guertel 18-20, Vienna 1090, Austria alexander.niessner@meduniwien.ac.at.
authors.forename: Alexander
authors.initials: A
authors.lastname: Niessner