title: Quality Control and Learning Curves at the Heart Center Leipzig.
authors.affiliation: Herzzentrum Leipzig, Herzchirurgie, Leipzig, Germany.
authors.forename: David M
authors.initials: DM
authors.lastname: Holzhey
authors.affiliation: Herzzentrum Leipzig, Herzchirurgie, Leipzig, Germany.
authors.forename: Anne-Katrin
authors.initials: AK
authors.lastname: Funkat
authors.affiliation: Herz- und Diabeteszentrum Nordrhein-Westfalen, Bad Oeynhausen, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Gummert