TY  - RPRT
TI  - Ian alexander McGregor
AU  - MHC Webster
AU  - P MacFarlane
PY  - 1998
DO  - 10.1136/bmj.317.7153.285
UR  - https://pubmed.ncbi.nlm.nih.gov/9677241/
ID  - 9677241
ER  -