"We are now collaborating with colleagues to sample patients in order to demonstrate the strengths, as well as limitations, of breath analysis more comprehensively, " she said.

BBC: Lung infection identified using 'breath-print'

Richard Hubbard, professor of respiratory epidemiology at Nottingham City Hospital and a spokesman for the British Lung Foundation, said breath analysis was already being used to diagnose children with asthma.

BBC: Lung infection identified using 'breath-print'

Other economists, including Robert Solow, have reviewed this book and picked nits about the breath of its economic analysis.

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