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Gómez-Batiste X, Tuca A, Corrales E, Porta-Sales J, Amor M, Espinosa J, Borràs JM, de la Mata I, Castellsagué X; Grupo de Evaluación-SECPAL.Gómez-Batiste X, et al.J Pain Symptom Manage. 2006 Jun;31(6):522-32. doi: 10.1016/j.jpainsymman.2005.11.015.J Pain Symptom Manage. 2006.PMID: 16793492Free article.