- Correspondence to Dr Jordi Casabona, Centre for Epidemiological Studies on STI and AIDS of Catalonia (CEEISCAT), Hospital Universitari Germans Trias i Pujol, Ctra de Canyet s/n, Badalona 08916, Spain;
- Received February 5, 2015
- Revised May 20, 2015
- Accepted June 13, 2015
- First published July 1, 2015.
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