Engel, Bettina
Gomm, Willy
Broich, Karl
Maier, Wolfgang
Weckbecker, Klaus
Haenisch, Britta http://orcid.org/0000-0002-4828-6058
Article History
Received: 9 May 2018
Accepted: 22 August 2018
First Online: 31 August 2018
Ethics approval and consent to participate
: Data access was legally approved by the Scientific Research Institute of the AOK (WIdO). The study is based on anonymised administrative claims data that never involved patients directly. Individual patients cannot be identified and the analyses presented do not affect patients whose anonymized records were used. Consent to participate: not applicable.
: Not applicable.
: The authors declare that they have no competing interests.
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