INTERACTIVE: What causes strokes?

Related: Heart health

1. Heart health
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   2. Just one daily soda can raise diabetes risk
   3. Gut bugs linked to heart attacks, strokes
   4. 12 school football players die each year, study finds
   5. Chelation little help for heart disease: study
2. Top health stories
   1. 'Why would we wait?': Sisters face Jolie cancer dilemma
   2. Making mentally ill defendants ready for trial
   3. Fitness protects men from cancer, even 20 years later
   4. Gymnophobics are real-life 'never-nudes'
   5. Chorus of critics greets new psychiatric manual
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