Funding for this research was provided by:
Deutsche Zentrum für Lungenforschung (82DZL00401, 82DZL00402, 82DZL00404, 82DZL00401, 82DZL00402, 82DZL00404)
Received: 26 December 2018
Revised: 13 February 2019
Accepted: 20 March 2019
First Online: 8 April 2019
Compliance with ethical standards
: The scientific guarantor of this publication is Fabian Rengier.
: The authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
: One of the authors has significant statistical expertise.
: Written informed consent was waived by the Institutional Review Board.
: Institutional Review Board approval was obtained.
: • retrospective• diagnostic or prognostic study• performed at one institution