Changes in prevalence of parent-reported autism spectrum disorder in school-aged U.S. children: 2007 to 2011-2012 /

Mode of access: Internet.

Adverse family experiences among children in nonparental care, 2011-2012 /

Mode of access: Internet.

Prevalence of reduced muscle strength in older U.S. adults: United States, 2011-2012 /

Mode of access: Internet.