Utilization of hair analysis for therape
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Toshihiko Uematsu
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Article
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1993
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Elsevier Science
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English
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Human scalp hair retains the past dosage history over a rather long period of time, acting as 'tape-recorder'. Each 1-cm length of hair contains the drug approximately corresponding to the amount ingested over a 1-month period when the hair is cut into 1-cm lengths successively from the scalp end. H