共 15 条
[1]
AKHTER J, 1992, Medical Science Research, V20, P129
[3]
CAMITTA B, 1994, J INFECT DIS, V169, P775
[4]
CHANOCK R M, 1974, Preventive Medicine, V3, P466, DOI 10.1016/0091-7435(74)90009-7