RT Journal T1 NAtional, state, and urban area vaccination coverage levels among children aged 19-35 months—united states, 2001 JF JAMA JO JAMA YR 2002 FD October 9 VO 288 IS 14 SP 1713 OP 1714 DO 10.1001/jama.288.14.1713 UL http://dx.doi.org/10.1001/jama.288.14.1713 AB