共 5 条
[2]
FROLAND SS, 1988, LANCET, V1, P1345
[3]
HASSELTVEDT V, 1990, MELDESYSTEM INFEKSJO, V18, P26
[4]
Ulstrup J C, 1988, Tidsskr Nor Laegeforen, V108, P1149
[5]
VONKROGH G, 1987, SCAND J INFECT DIS, V19, P285, DOI 10.3109/00365548709018471