Kostik, Mikhail M. http://orcid.org/0000-0002-1180-8086
Kopchak, Olga L. http://orcid.org/0000-0002-3187-8997
Chikova, Irina A. http://orcid.org/0000-0003-4636-5825
Isupova, Eugenia A. http://orcid.org/0000-0002-0911-7817
Mushkin, Alexander Y. http://orcid.org/0000-0002-1342-3278
Funding for this research was provided by:
Russian Foundation for Basic Research (18-515-57001)
Article History
Received: 16 July 2018
Accepted: 27 August 2018
First Online: 31 August 2018
Compliance with ethical standards
:
: Informed consent obtained from all parents/guardians of minors participating in the study according to the declaration of Helsinki.
: The study was approved by the local Ethics Committee of St.-Petersburg State Pediatric University (protocol number 10/8 from 23.10.2017).
: The authors declare that they have no conflict of interests.