Looking for research articles articles written by nurses? CINAHL (Cumulative Index to Nursing and Allied Health Literature) can help. It has limits for Research articles. It also has limits for "First Author Nurse" "Any Author is a Nurse."
1) Click the "Advanced Search" option below the search bar. 
2) Type in your keywords from your research topic.
3) Scroll down a bit and select "first author is nurse" or "any author is nurse." You may want to start with "any author is nurse" for the most results.
In the Nursing & Allied Health Database, you can search for articles by a nurse by searching "RN" or other nursing degree credentials (FNP, DNP, MSN, APRN, etc.)
1) Click on "advanced search."
2) Select the "anywhere" drop down and select "Author-AU." 
3) In the corresponding search field, type in nursing credentials like "RN." Or try searching "nursing" since other countries have different nursing credentials or put it all together using "OR." Example: (nursing OR RN OR MSN)
In Pubmed, you can search the author's affiliation, as in where the author teaches or the author's degree credentials.
1) Select "Advanced Search."
2) Type in your keywords in to one field.
3) In the other field, change "All Fields" to "Affiliation" and type in "RN OR MSN OR DNP OR NURSING." Click search!
4) When you find an article of interest, click on the title and then select "author affiliation" under the authors' names. Hopefully, you've found a nurse!
