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. 2017 Nov 25;45(5):325–331. doi: 10.1097/OLQ.0000000000000753

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Copyright © 2017 The Author(s). Published by Wolters Kluwer Health, Inc. on behalf of the American Sexually Transmitted Diseases Association.

This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.

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Flowchart of all STI clinic consultations in which chemsex practices were asked at the Public Health Service of Amsterdam, the Netherlands; July to December 2016. ^aChemsex characteristics were not asked when someone was tested: (1) through the online MSM screening program (Man Tot Man), (2) through participation of the Amsterdam Cohort Study, (3) as part of a sexual health (SENSE) consultation for clients till the age of 25 years without STI screening, and (4) through a self-screening test (not applicable to MSM). ^bNon-MSM are defined as men who have sex with women (MSW), women who have sex with men (WSM), and women who have sex with women (WSW).