Received: 24 March 2020
Accepted: 8 September 2020
First Online: 7 October 2020
Ethics approval and consent to participate
: In IBTO, each donor has to sign a <i>consent</i> before <i>donation. Based on these forms, donors</i> permit the IBTO to store their information in the blood donor database. This study used the data stored in this national database. The protocol of the study was approved by the Research Committee of High Institute for Research and Education in Transfusion Medicine.
: Not applicable.
: The authors declare that they have no competing interests.