TY  - RPRT
TI  - Deep venous thrombosis: diagnostic techniques.
AU  - T Hallbook
AU  - L Ling
PY  - 1971
DO  - 10.1016/s0140-6736(71)92403-2
UR  - https://pubmed.ncbi.nlm.nih.gov/4108301/
ID  - 4108301
ER  -