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Maret W, Sandstead HH.Maret W, et al. Among authors: sandstead hh.J Trace Elem Med Biol. 2006;20(1):3-18. doi: 10.1016/j.jtemb.2006.01.006. Epub 2006 Feb 21.J Trace Elem Med Biol. 2006.PMID: 16632171Review.