Joyce Bridgewater, from Camelford in Cornwall, suffered low-level CO poisoning by breathing the colourless odourless gas in her home over a period of 10 years and now has to use a wheelchair.

BBC: Warning over rise in carbon monoxide fatalities

Cornwall Fire and Rescue Service has seen more than a five-fold increase in carbon monoxide (CO) poisoning cases over the last 12 months, it said.

BBC: Fire service sees rise in carbon monoxide poisoning cases

He co-authored a study about cyanide poisoning and pediatric patients.

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