共 22 条
[2]
Bethell CD, 2004, PEDIATRICS, V113, P1529
[4]
Blumberg Stephen J, 2003, Vital Health Stat 1, P1
[6]
*DEP HLTH HUM SERV, 2005, MED INF SOURC
[7]
Flores G, 1998, ARCH PEDIAT ADOL MED, V152, P1119