TY - JOUR T1 - Quickstats: From the national center for health statistics percentage of emergency department visits by persons aged ≤18 years, by primary expected source of payment—national hospital ambulatory medical care survey, united states, 2001-2002 to 2009-2010 Y1 - 2013/02/20 N1 - JO - JAMA SP - 653 EP - 653 VL - 309 IS - 7 N2 - SN - 0098-7484 M3 - doi: UR - http://dx.doi.org/ ER -