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Gotsens M, Marí-Dell'Olmo M, Pérez K, Palència L, Borrell C; Other MEDEA Members.Gotsens M, et al.Accid Anal Prev. 2013 Mar;51:120-8. doi: 10.1016/j.aap.2012.10.020. Epub 2012 Dec 3.Accid Anal Prev. 2013.PMID: 23207841