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Cruz-Orduña I, Bellón JM, Torrero P, Aparicio E, Sanz A, Mula N, Marzana G, Begué C, Cabezón D, Olazarán J.Cruz-Orduña I, et al. Among authors: olazaran j.Fam Pract. 2012 Aug;29(4):401-6. doi: 10.1093/fampra/cmr114. Epub 2011 Nov 25.Fam Pract. 2012.PMID: 22121012Clinical Trial.