Eichner, June E., author.
Rockville, MD : National Resource Center for Health IT, Agency for Healthcare Research and Quality, U.S. Department of Health and Human Services, 2007.
2007
Hsiao, Chun-Ju, author.
Hyattsville, MD : U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, 2012.
2012