Text and Data Mining valid from 2019-11-05
Received: 12 June 2019
Accepted: 9 October 2019
First Online: 5 November 2019
Ethics approval and consent to participate
: The study protocol was approved by the Local Bioethical Committee of the Karol Marcinkowski University of Medical Sciences (decision no. 399/18).All participants took part in the study voluntarily and were informed that they could discontinue their involvement at any time.
: The manuscript does not contain any individual person’s data in any form.
: The authors declare that they have no competing interests.