title: Changing methods of NCHS surveys: 1960-2010 and beyond.
authors: Office of Director, National Center for Health Statistics, CDC, Hyattsville, Maryland, USA. mgsirken@aol.com
authors: Monroe G
authors: MG
authors: Sirken
authors: Rosemarie
authors: R
authors: Hirsch
authors: William
authors: W
authors: Mosher
authors: Chris
authors: C
authors: Moriarity
authors: Nancy
authors: N
authors: Sonnenfeld
mesh_terms: D003625:Data Collection; D019538:Health Care Surveys; D006306:Health Surveys / Q000266:history* / Q000379:methods; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans; D009309:National Center for Health Statistics, U.S. / Q000266:history*; D018401:Sample Size; D011795:Surveys and Questionnaires; D014481:United States