Limiting to review literature reduces the number to 121 citations. The total number of citations could be further reduced by limiting to articles written in English language journals or articles pertaining to human subjects. After you have created a set, the OVID system will return you to the main menu. The set you created will be the last search statement to appear on the screen. Select the Reviews check box.
Many subjects have thousands of citations.
Creating another subject set and then commanding the system to find articles where both topics are present results in a smaller, but more specific set of citations. One way to narrow your search is to add another subject of interest. Perhaps you are interested in a possible relationship between smoking and laryngeal neoplasms. After you have created a set the OVID system will return you to the main menu. The newest set you created will be the last search statement to appear on the screen.