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This page searches information from the main area of the NIOSH website only. To search other areas, return to the Search
Options page.
Enter search terms separated by spaces.
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Boolean operators (and, or, not), Nesting with parentheses, and
Truncation symbols (*) can be used to develop more complex search
queries. These queries can be entered directly into the Search
box. Quotation marks can be used around phrases to retrieve documents
containing the exact phrase.
Examples: |
Results: |
| birth defect* |
retrieval set includes coverage of birth defect or birth
defects |
| birth defects and folic acid |
retrieval set includes content covering birth defects and folic
acid in the same document |
| birth defects or folic acid |
retrieval set includes either content covering birth defects or
content covering folic acid |
| birth defects not folic acid |
retrieval set includes content that covers birth defects where folic
acid is not covered in the document |
| (neural tube defects or birth defects) and folic acid |
retrieval set includes content where either neural tube
defects or birth defects is covered and prevention
with folic acid is covered in all content |
| "neural tube" |
retrieval set includes content where the exact phrase neural
tube appears in the document |
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Page last updated: November 16, 2005
Page last reviewed: January 7, 2008
Content Source: National Institute for Occupational Safety and Health (NIOSH)
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