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O V I D Ovid MEDLINE(R)
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Notice the results. In set #4, it indicates that we limited set #3 to "randomized controlled trials". We now have 342 randomized controlled trials.

In order to get a smaller, more manageable, set of results limit again to the Publication Year -

and click the Perform Search button.

#Search HistoryResultsDisplay
1
exp *DIABETES MELLITUS/
47707 Display
2
exp *Blood Glucose/
5409 Display
3
1 and 2
2539 Display
4
limit 3 to randomized controlled trial
342 Display
 
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Publication Year -

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