共 16 条
[1]
ALBERT MJ, 1993, LANCET, V341, P704
[4]
OBRIEN TF, 1987, REV INFECT DIS, V9, pS244
[5]
OBRIEN TF, 1994, 6TH INT C INF DIS, P404
[6]
STREATFIELD R, 1992, COMMUNICABLE DIS INT, V17, P330
[8]
1992, EPIDEMIOL B, V13, P1
[9]
1991, WER, V66, P55
[10]
1993, WER, V68, P159