Funding for this research was provided by:
European Commission, Seventh Framework Programme (602051)
Received: 13 May 2019
Accepted: 23 July 2019
First Online: 29 July 2019
Ethics approval and consent to participate
: Approval was granted by the Ethics Committees of Specialized Hospital for Active Treatment of Infectious and Parasitic Diseases “Prof. Ivan Kirov”, Sofia, Bulgaria; Colentina Teaching Hospital, Bucharest, Romania; and Hacettepe University Hospital, Ankara, Turkey. All individuals presenting to the screening sites to participate to the study were informed by the study staff in their local language, were given the Participant Information Sheet, and signed the informed consent before proceeding with the study procedures.
: Not applicable.
: The authors declare that they have no competing interests.