Noah won its case, Dr Menache said, by basing it on actual autopsies of birds that had been force-fed to prove the damage to their digestive system, throat and other organs.

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Cystic fibrosis is a life-threatening disorder that causes severe damage to the lungs and digestive system.

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Experts say the effects are only more serious if the substance is ingested, when it can cause damage to lungs and the digestive system, and could prove fatal in some cases.

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