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Hygrine (HYG) and cuscohygrine (CUS) are natural alkaloids of coca leaves but are not found in illicit cocaine seizures. Therefore, they were proposed as markers for coca chewing in contrast to… (More)
BACKGROUND Hair samples from children are frequently analyzed in order to characterize their endangerment in a drug using environment. However, the interpretation of the results remains difficult… (More)
BACKGROUND Hair analysis is a suitable way to discriminate between coca chewers and consumers of manufactured cocaine using the coca alkaloids hygrine (HYG) and cuscohygrine (CUS) as markers. In the… (More)