- Correspondence to Sandra Dudareva-Vizule, Department for Infectious Disease Epidemiology, HIV/AIDS, STI and Bloodborne Infections Unit, Robert Koch Institute, DGZ-Ring 1, Berlin 13086, Germany;
- Received 14 November 2012
- Revised 19 June 2013
- Accepted 21 July 2013
- Published in print 1 February 2014.
- Published online 15 January 2014.
- Published first 6 August 2013.
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