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Switzerland's Dependence on a Diamorphine Monopoly. 

Schmitt-Koopmann C, Baud CA, Junod V, Simon O. 

Front Psychiatry. 2022 May 9;13:882299. doi: 10.3389/fpsyt.2022.882299. PMID: 35615450; PMCID: PMC9125182.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9125182/