Article History
Received: 24 July 2021
Accepted: 30 March 2022
First Online: 12 April 2022
Declarations
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: Not applicable.
: Not applicable.
: Author HJ Viviers is employed at the National Analytical Forensic Services (NAFS) and the authors declare the financial interests/personal relationships may be considered as potential competing interests. NAFS did not play any role in the design and conduct of the study, writing of manuscript, or decision to publish. The data was accumulated by the analysis of routine samples submitted to the laboratory. Consent was provided by the laboratory and clients to use and publish data in anonymised format.