Winter, Julia http://orcid.org/0000-0002-6323-5152
Bartsch, Birgit
Schütz, Claudia
Jablonski-Momeni, Anahita
Pieper, Klaus
Article History
Received: 15 September 2017
Accepted: 19 March 2018
First Online: 26 March 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The study was approved by the Ethics Committee of the Faculty of Medicine, University of Marburg, Germany (file number—Study 196/11, chairman—Prof. G. Richter).
: Informed consent was obtained from all parents whose children participated in the study.