Funding for this research was provided by:
Faculty of Medicine, University Hospital of Cologne
Deutsches Zentrum für Infektionsforschung (None)
Article History
Received: 21 September 2018
Accepted: 11 November 2018
First Online: 17 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: For this type of study, formal consent is not required.