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van den Beuken-van Everdingen MH, de Rijke JM, Kessels AG, Schouten HC, van Kleef M, Patijn J.van den Beuken-van Everdingen MH, et al. Among authors: kessels ag.J Pain Symptom Manage. 2009 Aug;38(2):216-33. doi: 10.1016/j.jpainsymman.2008.08.014. Epub 2009 Jun 28.J Pain Symptom Manage. 2009.PMID: 19564094Free article.