Received: 31 January 2020
Accepted: 25 June 2020
First Online: 10 July 2020
Ethics approval and consent to participate
: The written informed consent was signed by all members of the case and control groups before enrolling in the study. Moreover, this study was performed based on the Declaration of Helsinki guidelines and was approved by the ethics committee at the Tehran University of Medical Sciences (Approval ID: IR.TUMS.MEDICINE.REC.1398.696).
: Not applicable.
: The authors declare that they have no competing interests.