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Author/Creator
- National Center for Health Statistics (U.S.)4
- Centers for Disease Control and Prevention (U.S.)2
- National Ambulatory Medical Care Survey (U.S.)2
- Thomson Reuters. Timely Data Resources2
- United States. Department of Health and Human Services2
- Japan. Sōmuchō. Tōkeikyoku1
- United States. Department of Commerce1
- United States. Department of Commerce. Office of Business Analysis1