Text and Data Mining valid from 2019-04-23
Received: 19 October 2018
Accepted: 28 March 2019
First Online: 23 April 2019
Ethics approval and consent to participate
: The studies included into our meta-analysis were reviewed and approved by the competent, independent ethics committees. The parents of all participating children provided written informed consent. Further details can be found in the original publications.
: Not applicable.
: GS, WL and WK received honoraria from Dr. Willmar Schwabe GmbH & Co. KG, Karlsruhe, Germany for scientific services. AZ and JBS are employees of Dr. Willmar Schwabe GmbH & Co. KG, Karlsruhe, Germany.
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