Funding for this research was provided by:
Narodowe Centrum Nauki (NN 407 275 439, 407 459 138)
Text and Data Mining valid from 2019-07-30
Received: 8 November 2018
Accepted: 19 July 2019
First Online: 30 July 2019
Ethics approval and consent to participate
: All procedures performed in studies 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. The study was approved by the ethics review board of Poznan University of Medical Sciences (Resolution No: 748/08) and patients participated in the study after their written informed consent was obtained.
: Not applicable.
: The authors declare that they have no competing interests.