title: Long-term stability of methadone in clinical plasma samples stored at -20 degrees C.
authors.affiliation: Programa Municipal de Drogas de Majadahonda, Spain.
authors.forename: M L
authors.initials: ML
authors.lastname: López
authors.forename: M D
authors.initials: MD
authors.lastname: Baño
authors.forename: J L
authors.initials: JL
authors.lastname: Guillén
mesh_terms: D000701:Analgesics, Opioid / Q000097:blood*; D015925:Cryopreservation; D004355:Drug Stability; D004356:Drug Storage; D006801:Humans; D008691:Methadone / Q000097:blood*; D010045:Outpatients; D013997:Time Factors
chemical_list: D000701:Analgesics, Opioid; D008691:Methadone