Free open access data sources are a valuable tool for dermatology researchers and may uncover crucial information about dermatological diseases and delivery of dermatological care. This short review discusses six open access data sources including: National Health and Nutrition Examination Survey (NHANES), National Health Interview Survey (NHIS), National Survey of Children's Health (NSCH), National Ambulatory Medical Care Survey (NAMCS)/National Hospital Ambulatory Medical Care Survey (NHAMCS), Centers for Medicare and Medicaid Services (CMS), and Gene Expression Omnibus (GEO). We explain the role of each data source in dermatology and provide examples of past studies, which have used these data repositories.
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