Platzek, Ivan http://orcid.org/0000-0002-5933-8108
Sieron, Dominik
Plodeck, Verena
Borkowetz, Angelika
Laniado, Michael
Hoffmann, Ralf-Thorsten
Article History
Received: 6 April 2018
Revised: 13 June 2018
Accepted: 21 June 2018
First Online: 16 July 2018
Compliance with ethical standards
:
: The scientific guarantor of this publication is Ivan Platzek, MD
: 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.
: Mrs. Uta Schwanebeck, from the Kompetenzzentrum für Klinische Studien (KKS), Technical University of Dresden, kindly provided statistical advice for this manuscript.
: Written informed consent was not required for this study because the study is a systematic review and meta-analysis. The authors of this study did not have access to primary data, just metadata extracted from previously published studies. Because of this, the current study does not influence the well-being or privacy of patients.
: Institutional review board approval was not required because the study is a systematic review and meta-analysis. The authors of this study did not have access to primary data, just metadata extracted from previously published studies. Because of this, the current study does not influence the well-being or privacy of patients.
: No study subjects or cohorts have been previously reported, except as a part of the primary studies included in this meta-analysis, which are listed in the reference list.
: • retrospective• meta-analysis• performed at one institution