Ethical approval and consent to participate
All procedures performed in studies involving human participants were following 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. The study protocol was approved by the Bioethics Committee of the Nicolaus Copernicus University in Toruń functioning at the Collegium Medicum in Bydgoszcz (permit No. KB/99/2016).