Contributions statement :
Ine I. Decuyper participated in interpretation of data, literature search, data analysis, writing the manuscript; Hans-Peter Rihs participated in discussion diagnostic techniques and proofreading final text; Jessy Elst participated in proofreading final text; Athina L. Van Gasse participated in proofreading final text; Vito Sabato participated in proofreading final text; Margaretha A. Faber participated in literature search and proofreading final text; Christel Mertens participated in performing IgE quantifications, interpretation of diagnostic data and proofreading final text; Margo M. Hagendorens participated in proofreading final text; Didier G. Ebo participated in litera- ture search, data analysis, writing and proofreading final text.
Funding sources: This work was supported by the Agency for Innovation by Science and Technology (IWT) [grant number 140185]; ALVG is a fellow of the FWO [1113617N]. The authors thank B. Van Camp, head of the Unit ‘drug production’, Central Drug Department, Directorate of organised crime, Belgian Federal Judicial police for providing Cannabis sativa plants. DGE is a Senior Clinical Researcher of the FWO (1800614N).
Conflicts of interest: None of the authors state a conflict of interest for this work.