TY - SER TI - British Medical Journal : Vol. 314 [7086 - 7098] April - June SN - 09598138 U1 - 616 PY - 1997/// CY - London PB - BMJ KW - MEDICAL SCIENCES KW - Medicine N1 - With Index UR - https://www.bmj.com/archive/print/1997 ER -