Westenhoefer, Joachim http://orcid.org/0000-0002-3203-6599
von Katzler, Robert
Jensen, Hans-Joachim
Zyriax, Birgit-Christiane
Jagemann, Bettina
Harth, Volker
Oldenburg, Marcus
Funding for this research was provided by:
Hamburg Süd ‘COLUMBUS’ Shipmanagement
Article History
Received: 11 April 2017
Accepted: 11 January 2018
First Online: 24 January 2018
Ethics approval and consent to participate
: The study protocol was approved by the Ethics committee of Medical Association Hamburg. All participants gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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