共 5 条
[1]
BAIRD DR, 1976, LANCET, V2, P1344
[2]
Dickson L G, 1969, J Egypt Public Health Assoc, V44, P349
[3]
GREENWOOD BM, 1974, CLIN EXP IMMUNOL, V16, P413
[5]
TUGWELL P, 1976, Q J MED, V180, P583