1. National Center for Health Statistics (US). Health, United States, 2019 [Internet]. Hyattsville (MD): National Center for Health Statistics (US); 2021. Available from: https://www.ncbi.nlm.nih.gov/books/NBK569306/10.15620/cdc:100685.
2. National Center for Health Statistics (US). Health, United States, 2017: With Special Feature on Mortality [Internet]. Hyattsville (MD): National Center for Health Statistics (US); 2018.Available from: https://www.ncbi.nlm.nih.gov/books/NBK532685/.
3. Ward B, Clarke T, Nugent C, Schiller J. Early Release of Selected Estimates Based on Data From the 2015 National Health Interview Survey. U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics Released 05/16. Available at: https:\\www.cdc.gov/nchs/data/nhis/earlyrelease/earlyrelease201605.pdf.
4. Clarke TC, Norris T, Schiller JS. Early release of selected estimates based on data from the National Health Interview Survey. National Center for Health Statistics. May 2019. Available from: https://www.cdc.gov/nchs/nhis.htm.
5. National Physical Activity Plan Alliance. The 2018 United States Report Card on Physical Activity for Children and Youth. Washington, DC: National Physical Activity Plan Alliance, 2018. Accessed on July 26, 2021, at: 2018_USReportCard_UPDATE_12062018.pdf (physicalactivityplan.org).