TY  - RPRT
TI  - Once bitten, twice shy.
AU  - J Marshall
AU  - E Sharp
AU  - I G Barrison
DO  - 10.1136/bmj.309.6970.1694a
UR  - https://pubmed.ncbi.nlm.nih.gov/7819993/
ID  - 7819993
ER  -