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Authors
Koenen, Paola https://orcid.org/0000-0001-8346-3462
Ates, Deha Murat
Pfeiffer, Thomas R.
Bouillon, Bertil
Bäthis, Holger
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Article History
Received: 30 March 2019
Accepted: 17 May 2019
First Online: 27 May 2019
Compliance with ethical standards
:
: HB has a consultant agreement with the companies BrainLAB and DePuy Synthes. DA received reimbursement of travel expenses by DePuy Synthes. All the other authors declare that there is no conflict of interests.
: Ethical approval for data collection was received from the local ethics commission (138/2018). All procedures involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments.
