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Article History

Received: 6 June 2019

Accepted: 9 August 2019

First Online: 1 October 2019

Ethics Approval and Consent to Participate

: This work was conducted in accordance with the principles of the Declaration of Helsinki and was approved by the Ethics Committee of the Institute of Hematology and Blood Transfusion, Prague, Czech Republic. All blood donors provided written informed consent.

: Not applicable.

: The authors declare that they have no competing interests.