title: The new interactive feature: Challenge of the Month.
authors.affiliation: Department of Cardiovascular Surgery, University Heart Center Freiburg - Bad Krozingen, Freiburg, Germany matthias.siepe@web.de.
authors.forename: Matthias
authors.initials: M
authors.lastname: Siepe
authors.affiliation: Department of Cardiovascular Surgery, University Heart Center Freiburg - Bad Krozingen, Freiburg, Germany.
authors.forename: Friedhelm
authors.initials: F
authors.lastname: Beyersdorf
mesh_terms: D002318:Cardiovascular Diseases / Q000601:surgery*; D003657:Decision Making; D019468:Disease Management; D006801:Humans; D010506:Periodicals as Topic; D019616:Thoracic Surgical Procedures; D014656:Vascular Surgical Procedures
keywords: Challenge of the Month; Clinical problems