The nurse is conducting a literature review. Which of the following will not assist the nurse when conducting a literature review? 1) One major purpose of a literature review is to learn what research has already been done in the area. 2) A text word search allows searchers to look for specific words in all test fields of records in the electronic database. 3) The literature review section should conclude with a critical evaluation of knowledge on the problem of interest. 4) Information from anecdotal and opinion articles is usually included in research literature.