title: Erratum to: Long-term monitoring of opioid, sedative and anti-inflammatory drugs in horse hair using a selective and sensitive LC-MS/MS procedure.
authors.affiliation: Zurich Institute of Forensic Medicine, Center for Forensic Hair Analytics, University of Zurich, Zurich, Switzerland. milena.madry@irm.uzh.ch.
authors.forename: Milena M
authors.initials: MM
authors.lastname: Madry
authors.affiliation: Zurich Institute of Forensic Medicine, Center for Forensic Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland.
authors.forename: Barbara S
authors.initials: BS
authors.lastname: Spycher
authors.affiliation: Institute of Veterinary Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland.
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Kupper
authors.affiliation: Clinic of Veterinary Surgery, Department of Large Animal Surgery, University of Zurich, Zurich, Switzerland.
authors.forename: Anton
authors.initials: A
authors.lastname: Fuerst
authors.affiliation: Zurich Institute of Forensic Medicine, Center for Forensic Hair Analytics, University of Zurich, Zurich, Switzerland.
authors.forename: Markus R
authors.initials: MR
authors.lastname: Baumgartner
authors.affiliation: Zurich Institute of Forensic Medicine, Center for Forensic Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland.
authors.forename: Thomas
authors.initials: T
authors.lastname: Kraemer
authors.affiliation: Institute of Veterinary Pharmacology and Toxicology, University of Zurich, Zurich, Switzerland. hanspeter.naegeli@vetpharm.uzh.ch.
authors.forename: Hanspeter
authors.initials: H
authors.lastname: Naegeli