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Klepstad P, Kaasa S, Cherny N, Hanks G, de Conno F; Research Steering Committee of the EAPC.Klepstad P, et al.Palliat Med. 2005 Sep;19(6):477-84. doi: 10.1191/0269216305pm1054oa.Palliat Med. 2005.PMID: 16218160