- Correspondence to Professor HJC de Vries, STI Outpatient Clinic, Department of Infectious Diseases, Public Health Service Amsterdam, Nieuwe Achtergracht 100, Amsterdam 1018 WT, The Netherlands;
- Received June 23, 2016
- Revised December 21, 2016
- Accepted January 4, 2017
- First published January 20, 2017.
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