Hayes, L W <br/><br/>
Concentrations of morphine and codeine in serum and urine after ingestion of poppy seeds.  [electronic resource] 

 -  Clinical chemistry  Jun 1987 
 - 806-8 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0009-9147 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Codeine--analysis<br/>Gas Chromatography-Mass Spectrometry<br/>Humans<br/>Morphine--analysis<br/>Papaver--analysis<br/>Plants, Medicinal--analysis<br/>Radioimmunoassay<br/>Seeds--analysis