Text and Data Mining valid from 2018-12-08
Received: 8 July 2018
Accepted: 4 December 2018
First Online: 8 December 2018
Compliance with ethical standards
: Katarzyna Haczkiewicz, Agata Sebastian, Aleksandra Piotrowska, Maria Misterska-Skóra, Agnieszka Hałoń, Marta Skoczyńska, Maciej Sebastian, Piotr Wiland, Piotr Dzięgiel and Marzenna Podhorska-Okołów declare that they have no conflict of interest.
: Obeying the principles of Good Clinical Practice and the principles of the Declaration of Helsinki the authors obtained the ethical approval from The Bioethics Committee of the Wroclaw Medical University (ethics approval date: 27 September 2018, protocol number: 501/2018), where the work was carried out.
: All procedures 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.
: Informed consent was obtained from all individual participants included in the study.