This document provides guidance on how to identify a research study. It states that a research study must ask a research question, identify a research population, describe a research method, test or measure something, and summarize results. It notes that research studies are published in peer-reviewed journals, and that articles that review other studies without presenting new research are not considered research studies. Examples of non-research study articles include literature reviews, meta-analyses, editorials, and letters relating to previously published research.