title: [Erratum to: Long-term therapy with opioids for chronic non-tumor-related pain. Systematic Review and Meta-analysis of the efficacy, tolerability and security in open connection studies over at least 26 weeks].
abstract: On p. 7, right column, the sentence "The mean average reductions in pain and disability were maintained from the end of the double-blind to the end of the open-label period up to 3 years later" is not correct. It should read "2 years" instead of "3 years".
authors.affiliation: Innere Medizin I, Klinikum Saarbrücken gGmbH, Winterberg 1, 66119, Saarbrücken, Deutschland, whaeuser@klinikum-saarbruecken.de.
authors.forename: W
authors.initials: W
authors.lastname: Häuser
authors.forename: K
authors.initials: K
authors.lastname: Bernardy
authors.forename: C
authors.initials: C
authors.lastname: Maier