TY  - SER
TI  - British Medical Journal : Vol. 307 [6895 - 6907] July - September
SN  - 09598138
U1  - 616 
PY  - 1993///
CY  - London
PB  - BMJ
KW  - MEDICAL SCIENCES
KW  - Medicine
UR  - https://www.bmj.com
ER  -