%0 Journal Article %T Codeine Concentration in Hair after Oral Administration Is Dependent on Melanin Content %A Kronstrand,, Robert %A Förstberg-Peterson,, Sophie %A KÅgedal,, Bertil %A Ahlner,, Johan %A Larson,, Göran %J Clinical Chemistry %V 45 %N 9 %P 1485-1494 %@ 0009-9147 %D 1999-09-01 %I Oxford Academic %~ DeepDyve