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Laugsand EA, Kaasa S, de Conno F, Hanks G, Klepstad P; Research Steering Committee of the EAPC.Laugsand EA, et al. Among authors: klepstad p.J Opioid Manag. 2009 Jan-Feb;5(1):11-21. doi: 10.5055/jom.2009.0002.J Opioid Manag. 2009.PMID: 19344044