Porowski, Tadeusz
Kirejczyk, Jan K.
Mrozek, Piotr
Protas, Piotr
Kozerska, Agata
Łabieniec, Łukasz
Szymański, Krzysztof
Wasilewska, Anna
Funding for this research was provided by:
Uniwersytet Medyczny w Bialymstoku (Grant No 143-41616L)
Article History
Received: 2 June 2017
Accepted: 10 January 2018
First Online: 22 January 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in the study 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.
: Informed consent was obtained from the parents of all participants and from adolescents older than 16 years of age.