title: Direct ELISA kits as a sensitive and selective screening method for abstinence control in urine.
authors.affiliation: Institute of Forensic Medicine, Rheinische Friedrich-Wilhelms University, Stiftsplatz 12, D-53111 Bonn, Germany. katrin.kirschbaum@ukb.uni-bonn.de
authors.forename: Katrin M
authors.initials: KM
authors.lastname: Kirschbaum
authors.forename: Frank
authors.initials: F
authors.lastname: Musshoff
authors.forename: Ansgar
authors.initials: A
authors.lastname: Wilbert
authors.forename: Jörg
authors.initials: J
authors.lastname: Röhrich
authors.forename: Burkhard
authors.initials: B
authors.lastname: Madea