- Correspondence to Dr Nicole H T M Dukers-Muijrers, Department of Sexual Health, Infectious Diseases and Environmental Health, Public Health Service South Limburg, P.O. Box 2022, Geleen 6160 HA, The Netherlands;
- Received 15 July 2016
- Revised 23 February 2017
- Accepted 6 March 2017
- Published online 21 August 2017.
Abstract in Dutch
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- Abstract in Dutch - Online abstract
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