The idea could be used as a predictive test for people who are unable to take an exercise-induced electrical stability test, Lampert said.

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Jo Lo Turco of the University of Connecticut, who also attended the meeting, did a similar test on mice that had genetically induced ectopias.

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The last three years, culminating in a war-induced standstill in much of the international economy, have been a special test.

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The scientists mixed it with the VEGF and injected the combination into the hearts of two groups of test animals, rats and pigs, in which they had induced heart attacks. (Pig hearts bear significant similarities to human ones.) In both cases, instead of being washed away, the VEGF stayed on the lattice and slowly got released over several weeks.

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With their new laser in hand, Dr Leitgeb and his colleagues set up an experiment that let them test the system on a range of skin conditions, including a healthy human palm, allergy-induced eczema on the forearm, inflammation of the forehead, and two previously diagnosed cases of basal-cell carcinoma.

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