[1]
J. M. Cao, BS, J. D. Ma, PharmD, C. M. Morello, PharmD, CDE, R. S. Atayee, PharmD, BCPS, and B. M. Best, PharmD, MAS, “Observations on hydrocodone and its metabolites in oral fluid specimens of the pain population: Comparison with urine”, J of Opioid Management, vol. 10, no. 3, pp. 177–186, May 2014.