Funding for this research was provided by:
the National Science Centre Poland (N N402 592140)
Medical Universyty of Gdansk (ST-553)
Article History
Received: 13 April 2018
Accepted: 17 December 2018
First Online: 3 January 2019
Ethics approval and consent to participate
: The study was approved by the Independent Bioethics Committee of Scientific Research at the Medical University of Gdansk, Poland (NKEBN/14/2006). Written informed consents were obtained from all subjects.
: Not applicable.
: The authors declare that they have no competing interests.
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