Kozioł, Milena
Nowak, Michał S. http://orcid.org/0000-0001-6304-1545
Udziela, Monika
Piątkiewicz, Paweł
Grabska-Liberek, Iwona
Szaflik, Jacek P.
Funding for this research was provided by:
European Social Fund (POWR 05.02.00-00.0149/15-01)
Article History
Received: 8 December 2019
Accepted: 23 April 2020
First Online: 4 June 2020
Compliance with ethical standards
:
: The authors declare no conflict of interest.
: The present study adhered to the tenets of the Declaration of Helsinki for research involving human subjects. However, we did not need to obtain ethic committee approval, as the study protocol was approved by the Polish Ministry of Health, which is entitled by the law of the Republic of Poland to process the National Health Fund data.
: For this type of study formal consent is not required.