Anxiety disorders affect about 40 million American adults—18% of the
population—in a given year, according to the National Institute of Mental
Health. Only about one-third of them seek treatment. The disorders run the gamut
from panic attacks and specific phobias to obsessive-compulsive disorder,
post-traumatic stress disorder and generalized anxiety disorder, a random kind
of worry described as free-floating and relentless.
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