Uhlig, Johannes http://orcid.org/0000-0003-3557-3194
Uhlig, Annemarie
Biggemann, Lorenz
Fischer, Uwe
Lotz, Joachim
Wienbeck, Susanne
Article History
Received: 9 May 2018
Revised: 17 July 2018
Accepted: 8 August 2018
First Online: 25 September 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Susanne Wienbeck.
: 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.
: Two authors have significant statistical expertise.
: Written informed consent was not required for this study because it is a meta-analysis.
: This study was performed in accordance with the Declaration of Helsinki. Ethical committee approval was not necessary because of the meta-analysis design.
: Parts of the study population have been previously reported as detailed in the InternalRef removed section as well as the references.
: • observational