The results of 103 medicolegal autopsies undertaken to detect the presence of cannabinoids in the urine are compared with stains on the hand supposedly suggestive of cannabis smoking using the 'bottleneck' technique. Experience with the EMIT d.a.u. (Enzyme Multiplied Immuno-Technique for drugs of abuse in the urine) cannabinoid assay system (Syva Corp., Palo Alto, California, USA) is discussed.
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