Use a Power Term™ and proper capitalization for best results (view examples)



Welcome to the new Quertle® v4.1!

What's new:
    •  Spelling Suggestions - not that you would ever make a mistake, of course
    •  New Journal Article Filter - so you can select Journal Articles as a category,
            as well as specific types of articles
    •  Expanded Ontology - as part of our ongoing effort to keep up-to-date

Why Quertle

Focused - Advanced linguistic methods provide relevant results
Powerful - Power Term™ queries allow searching for entire categories
Easy-to-use - Filters, including Key Concepts, help you explore
Content - All of PubMed (>3 million full-text), NIH Grants, TOXLINE, and more

Quertle's innovations won an award from theNational Library of Medicine.

View our introductory3 min Video.

How to Quertle

Check out our newGuided Tour.

Focus your search on a core concept. Put authors and journals in their own fields. Leave dates and publication type for the filters on the results page.
     View Examples. 30 sec Video.

Use a Power Term™ to search for an entire category, such as Diseases.
     More Info. View Examples. 30 sec Video.

Use proper capitalization when there is ambiguity (e.g., AIDS vs. aids).
     More Info. 30 sec Video.

Write out terms since abbreviations can mean many things.
     More Info. 30 sec Video.

Use verbs in your query to focus the search.
     More Info. View Examples. 30 sec Video.

Quertle User Guide and other Resources

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