- Correspondence to Professor Otylia Kowal-Bielecka, Department of Rheumatology and Internal Medicine, Medical University of Bialystok, Ul. M. Sklodowskiej-Curie 24A, Bialystok 15-276, Poland;
- Received 18 May 2016
- Revised 22 August 2016
- Accepted 9 October 2016
- Published online 11 July 2017.
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