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2. Job descriptions with their irritants and allergens;Adams,1999
3. Cancer statistics 2000;American Cancer Society;CA Cancer J Clin,2000
4. Black and white human skin differences;Andersen;J Am Acad Dermatol,1979
5. Follow-up of workers from the prefabricated concrete industry after the addition of ferrous sulfate to Danish cement;Avnstorp;Contact Dermatitis,1989