Funding for this research was provided by:
Pasteur Institute of Iran and the Center for Communicable Disease Control of Iranian Ministry of Health (No. 810)
Received: 26 January 2019
Accepted: 22 May 2019
First Online: 7 June 2019
Ethics approval and consent to participate
: The scientific committee and the medical ethics committee of Pasteur Institute of Iran approved the study. All adult subjects submitted an informed written consent.
: Not applicable.
: The authors declare that they have no competing interests.