The Advanced Search tab of CINAHL offers many ways to limit your search results. Some key limiters are highlighted below. Articles can be limited to only those that are peer reviewed, evidence based practice, nurse authors, or you can select specific criteria to apply to patients, such as age group or gender. You can also search by Publication Type to find Practice Guidelines, Questionnaires, Review Articles and more. Multiple limits can be applied to any search by holding down the Control key. Most of these limiters have to be applied before your search.