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Authors
Jensen, Kai Oliver https://orcid.org/0000-0002-6207-8087
Teuben, Michel Paul Johan
Lefering, Rolf
Halvachizadeh, Sascha
Mica, Ladislav
Simmen, Hans-Peter
Pfeifer, Roman
Pape, Hans-Christoph
Sprengel, Kai
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Article History
Received: 13 November 2019
Accepted: 14 January 2020
First Online: 29 January 2020
Compliance with ethical standards
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: The authors declare that they have no conflict of interest. RL declares that his institution receives an ongoing support from AUC GmbH which is the owner of the registry data. This service agreement includes statistical support for scientific publications using registry data.
: This study has been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Due to this ethical approval no consent to participate in the study was needed, because only anonymized data were used.
