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Bruera E, El Osta B, Valero V, Driver LC, Pei BL, Shen L, Poulter VA, Palmer JL.Bruera E, et al. Among authors: driver lc.J Clin Oncol. 2007 Aug 10;25(23):3475-81. doi: 10.1200/JCO.2007.10.9231.J Clin Oncol. 2007.PMID: 17687152Clinical Trial.