共 13 条
[7]
HALEY RW, 1985, AM J EPIDEMIOL, V121, P183
[8]
HALEY RW, 1985, AM J INFECT CONTROL, V12, P97
[9]
Hughes J M, 1983, MMWR CDC Surveill Summ, V32, p1SS
[10]
Longo D R, 1984, QRB Qual Rev Bull, V10, P81