共 6 条
[1]
BROCK DJH, 1972, LANCET, V2, P197
[2]
PURVES LR, 1972, S AFR MED J, V46, P1290
[3]
PURVES LR, IN PRESS
[5]
SEPPALA M, 1973, LANCET, V1, P155
[6]
SEPPALA M, 1972, BRIT MED J, V2, P769