TY  - RPRT
TI  - Weak at the knees.
AU  - G Webster
AU  - H Beynon
PY  - 1999
DO  - 10.1016/s0140-6736(99)08318-x
UR  - https://pubmed.ncbi.nlm.nih.gov/10568573/
ID  - 10568573
ER  -