Funding for this research was provided by:
Polish Ministry of Science and Higher Education (N N 407016135)
Received: 21 February 2019
Accepted: 24 September 2019
First Online: 4 November 2019
Ethics approval and consent to participate
: The protocol of this study was performed in accordance with the Declaration of Helsinki and approved by Local Bioethical Committee at the Medical University of Lublin (No. KE-0254/143/2007). The subjects gave their written informed consent prior to any procedure. Authors gained informed consent for publication of the dataset from participants at the point of recruitment to the trial.
: Not applicable.
: The authors declare that they have no competing interests.