Sobiak, Joanna http://orcid.org/0000-0002-2764-1575
Resztak, Matylda
Pawiński, Tomasz
Żero, Paweł
Ostalska-Nowicka, Danuta
Zachwieja, Jacek
Chrzanowska, Maria
Funding for this research was provided by:
Uniwersytet Medyczny im. Karola Marcinkowskiego w Poznaniu (502-14-03306413-10156)
Article History
Received: 7 January 2019
Accepted: 27 May 2019
First Online: 6 June 2019
Compliance with ethical standards
: The study was approved by the Bioethical Committee at Poznan University of Medical Sciences.
: The authors declare that they have no conflict of interest.
: Informed consent to participate was obtained from all parents or guardians of individual participants included in the study.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.