Wojszel, Z. B. http://orcid.org/0000-0002-6472-5241
Kasiukiewicz, A. http://orcid.org/0000-0003-0419-5709
Article History
First Online: 30 August 2019
Compliance with ethical standards
:
: All authors declare no conflict of interest.
: The study was approved by the Ethics Committee at the Medical University of Bialystok (No. R-I-002/305/2013). All procedures performed in the study were in accordance with the ethical standards of the Medical University of Bialystok Ethics Committee and with the Helsinki declaration and its later amendments. The study can be classified as a study of ‘usual practice’. All study participants gave their informed consent to participate in the initial study.