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Schulz C, Conrad A, Becker K, Kolossa-Gehring M, Seiwert M, Seifert B.Schulz C, et al.Int J Hyg Environ Health. 2007 May;210(3-4):271-97. doi: 10.1016/j.ijheh.2007.01.034. Epub 2007 Mar 7.Int J Hyg Environ Health. 2007.PMID: 17347043
Wilhelm M, Ewers U, Schulz C.Wilhelm M, et al. Among authors: schulz c.Int J Hyg Environ Health. 2003 Jun;206(3):223-9. doi: 10.1078/1438-4639-00208.Int J Hyg Environ Health. 2003.PMID: 12872532