1 Institute of Medical Statistics, Computer Sciences and Documentation, Jena University Hospital, Friedrich Schiller University Jena, Bachstraße 18, Jena 07743, Germany. Electronic address: [email protected].
2 Department of Radiology, Charité Universitätsmedizin Berlin, Charitéplatz 1, Berlin 10117, Germany.
3 Institute of Medical Statistics, Computer Sciences and Documentation, Jena University Hospital, Friedrich Schiller University Jena, Bachstraße 18, Jena 07743, Germany.