共 34 条
[2]
Beale N, 1997, BRIT J GEN PRACT, V47, P68
[3]
BLACK RE, 1990, REV INFECT DIS, V12, pS73
[4]
BRYANT HE, 1991, CAN J PUBLIC HEALTH, V82, P316
[5]
Cartwright R. Y., 1997, World Health Statistics Quarterly, V50, P102
[6]
CARTWRIGHT RY, 1992, PHLS MICROBIOL DIGES, V9, P365
[8]
COSSAR JH, 1983, J ROY COLL GEN PRACT, V33, P642
[9]
Cossar Jonathan H., 1992, Health Bulletin (Edinburgh), V50, P428