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Joseph RE Jr, Höld KM, Wilkins DG, Rollins DE, Cone EJ.Joseph RE Jr, et al. Among authors: cone ej.J Anal Toxicol. 1999 Oct;23(6):396-408. doi: 10.1093/jat/23.6.396.J Anal Toxicol. 1999.PMID: 10517543Clinical Trial.