[1
]
EFORT-EAR (European Arthroplasty Register) Scientific Office, Medical University of
Innsbruck, Austria; Medical University of Graz, OPZ Graz, Plüddemanngasse 45, 8010
Graz, Austria. Electronic address: pabinger@opz.at.
[2
]
Medical University of Graz, OPZ Graz, Plüddemanngasse 45, 8010 Graz, Austria; University
of Music and Performing Arts Graz, Fischergasse 14/II/12, 8010 Graz, Austria. Electronic
address: harald@lothaller.net.
[3
]
Department of Health Care Management, WHO Collaborating Centre for Health Systems
Research and Management, Berlin University of Technology, Straße des 17. Juni 135,
H80 10623 Berlin, Germany. Electronic address: a.geissler@tu-berlin.de.