共 4 条
[1]
*CDC, 1997, MMWR-MORBID MORTAL W, V46, P12
[2]
*CDC, 1999, MMWR-MORBID MORTAL W, V48, P871
[3]
*CDC, 1994, GUID ARB SURV US 199, P4
[4]
1999, MMWR, V48, P890