From each individual news item click on Back at the bottom of the page to return to the titles page. The terms used in the last search remain on screen so that additional refinements can be introduced if necessary. Click on the pushbutton to the right of each field to open the associated browse index and select a term or terms from the list. If more than one term is selected for a given field, terms are automatically combined using the Boolean OR operator, which can be modified if necessary. The browse index for the Company field is subdivided by letter of the alphabet.
Truncation is automatic on both the left and right and no truncation operators are necessary.
The AND, OR, and NOT Boolean search operators can be used to combine search terms in each field. The OR operator is entered automatically if more than one term is chosen from a browse index. Within each option results are ordered by date. For example, a search to be grouped by Company will list the title of a news item more than once if more than one company is cited in the body of the text. This also occurs when drugs from different therapeutic categories are cited in a single text.