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	1.	Sensitivity of an opiate immunoassay for detecting hydrocodone and hydromorphone in urine from a clinical population: analysis of subthreshold results. [electronic resource] by Bertholf, Roger L Johannsen, Laura M Reisfield, Gary M Producer: 20151006 In: Journal of analytical toxicology vol. 39 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	2.	False-positive acetaminophen results in a hyperbilirubinemic patient. [electronic resource] by Bertholf, Roger L Johannsen, Laura M Bazooband, Alireza Mansouri, Vafa Producer: 20030424 In: Clinical chemistry vol. 49 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)
	3.	Failure of amoxicillin to produce false-positive urine screens for cocaine metabolite. [electronic resource] by Reisfield, Gary M Haddad, Judella Wilson, George R Johannsen, Laura M Voorhees, Kathryn L Chronister, Chris W Goldberger, Bruce A Peele, James D Bertholf, Roger L Producer: 20080916 In: Journal of analytical toxicology vol. 32 Online resources: Available from publisher's website Availability: No items available. Save to lists Add to cart (remove)

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