Medicine: Cause of Death

Percy Lawrence, a South London plumber, was a 50-a-day chain smoker. He had worked up to this forced-draft rate in the Royal Navy during World War II, and never tapered off. As Lawrence lost weight and complained of always being tired, Dr. Paul Frederick Lister advised him to cut down. Still he went right on smoking. Last August Dr. Lister did a bronchoscopy, found cancer of the lung originating in a bronchus (one of the main branches of the windpipe). In little more than two months the cancer killed Lawrence, 51, husband and father.

British doctors had been...

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