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| Brain blood vessels clue to MS
|  More than 55 percent of multiple sclerosis patients have been found to have constricted blood vessels in their brains, a US study says. | | |
| HIV phobia
| | Mystery 'paranoia' illness baffles doctors in China | | |
| Pesticide ban
|  Georgina Downs' 10 year fight against farm chemicals | | | | 
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Scientists say they have identified three genes which may cause stammering in some people.