Analysis: Hair Follicle Testing Detects Passive Exposure to Cannabis Smoke

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A physician holds a bottle of medical cannabis in one hand and points to a 3D model of an enlarged human skin and hair follicle cross sectionA physician holds a bottle of medical cannabis in one hand and points to a 3D model of an enlarged human skin and hair follicle cross sectionSecond-hand cannabis exposure for 15-minute intervals triggered positive test results.

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