What percentage of americans will suffer from some sort of mental health disorder at some point in their lives?

The purity of ecstasy is always in question, why? (short answer)

Which of the following foods would be the best choice for someone who's lactose-intolerant?   a.  frozen yogurt    b.  strawberry sorbet    c.  cheesecake    d.  chocolate ice cream

Which respiratory measurement as useful in differentiating between obstructive and restrictive pulmonary dysfunction