Breath gas analysis

Dolphin ‘breathalyzer’ could help diagnose animal and ocean health
High rates of lung cancer (indicated in this map by brown colors) are highly correlated with the Stroke Belt. (Photo credit: Wikipedia)
Breath Analysis Offers Non-invasive Method to Detect Early Lung Cancer
The Diabetes ‘Breathalyzer’
‘Heart in a box’ invention allows transplant hearts to remain outside the body for 12 hours