Funding for this research was provided by:
Università Degli Studi di Modena e Reggio Emila (CONVCAMPOG)
Received: 18 July 2019
Accepted: 10 September 2019
First Online: 18 September 2019
Ethics approval and consent to participate
: The analyses of the suspected illicit substances reported in this study were carried out on non-biological samples, at the request of the Judicial Authority. Only the Judicial Authority could link the results with the identity of the subjects. The institutional review board of the University of Modena and Reggio Emilia assessed this study as not requiring ethical approval.
: The authors declare no competing interests for this work