Funding for this research was provided by:
Országos Tudományos Kutatási Alapprogramok (109451)
Text and Data Mining valid from 2018-06-22
Received: 11 May 2018
Accepted: 15 June 2018
First Online: 22 June 2018
Ethics approval and consent to participate
: Our study was reviewed and approved by the Hungarian Medical Research Council (TUKEB 6578-0/2011-EKU) and written informed consent was obtained from parents of all participants. The study was adhered to the tenets of the most recent revision of the Declaration of Helsinki.
: Written informed consent was obtained from parents of all participants.
: The authors declare that they have no competing interests.
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