Haussmann, Jan
Nestle-Kraemling, Carolin
Bölke, Edwin
Wollandt, Sylvia
Speer, Vanessa
Djiepmo Njanang, Freddy-Joel
Tamaskovics, Bálint
Gerber, Peter Arne
Orth, Klaus
Ruckhaeberle, Eugen
Fehm, Tanja
Corradini, Stefanie
Lammering, Guido
Mohrmann, Svjetlana
Audretsch, Werner
Maas, Kitti
Roth, Stephan
Kammers, Kai
Budach, Wilfried
Matuschek, Christiane
Article History
Received: 3 August 2019
Accepted: 21 November 2019
First Online: 9 January 2020
Compliance with ethical guidelines
:
: J. Haussmann, C. Nestle-Kraemling, E. Bölke, S. Wollandt, V. Speer, F.‑J. Djiepmo Njanang, B. Tamaskovics, P.A. Gerber, K. Orth, E. Ruckhaeberle, T. Fehm, S. Corradini, G. Lammering, S. Mohrmann, W. Audretsch, K. Maas, S. Roth, K. Kammers, W. Budach, and C. Matuschek declare that they have no competing interests.
: There was no ethics approval necessary, because in this meta-analysis, we were pulling numbers from the published manuscripts and pooling results. The study was approved by the local ethics committee (no.: 4049 and 4070).