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Article History

Received: 19 June 2019

Accepted: 10 June 2020

First Online: 16 July 2020

Ethics approval and consent to participate

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: The author works for the endowment fund “Research and Prevention Fund, Apothicom” (FRPA). FRPA is a philanthropic organisation whose main mission is to reduce health risks resulting from drug use, in particular in people who inject drugs, a mission completely in line with the scope of this article.FRPA is a major shareholder of Apothicom Distribution, a company that develops and sells harm reduction tools (among which cotton filters, Sterifilt, Sterifilt + and wheel filters). Indirectly, the financial situation of Apothicom Distribution thus has an influence on the financial health of the research and prevention fund.In the past, LK has worked for Apothicom Distribution on the development of the Sterifilt and the Sterifilt +. The author thus has a professional and a personal interest in difficulties encountered by PWID when filtering their drugs, as well in filters as harm reduction tools. She has received no fee from Apothicom Distribution for this work, nor does she have any stock options of this company.From my point of view, this type of studies on the efficacy and studies on the acceptability by PWID of harm reduction methods and tools are an important part of our work and help us to provide a service of a better quality.