title: Certification of drugs of abuse in a human serum standard reference material: SRM 1959.
authors.affiliation: Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. susan.tai@nist.gov
authors.forename: Susan S-C
authors.initials: SS
authors.lastname: Tai
authors.forename: Jocelyn L
authors.initials: JL
authors.lastname: Prendergast
authors.forename: Lorna T
authors.initials: LT
authors.lastname: Sniegoski
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Welch
authors.forename: Karen W
authors.initials: KW
authors.lastname: Phinney
authors.forename: Nien Fan
authors.initials: NF
authors.lastname: Zhang