Received: 4 January 2018
Accepted: 5 March 2019
First Online: 27 April 2019
Ethics approval and consent to participate
: The study questionnaire and consent forms have been attained from the participants and all participants signed informed consent forms.The Iranian Hemophilia Society approved the protocol.
: Authors declare that there is no conflict of interest.
: The authors declare that they have no competing interests.
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