mansooreh dehghani research center for health sciences, department of environmental health engineering, school of health, shiraz university of medical sciences, shiraz, ir iran maryam mosleheyan department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran samaneh karimiyan department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran zahra faramarzi department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran marziye ansari department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran narges shamsedini department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran; department of environmental health engineering, school of health, student research committee, shiraz university of medical sciences, shiraz, ir iran. tel: +71-37251003, fax: +71-37250226

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