Answers:
yes
both are adjectives co morbid disorders
both hold be associated next to low level of dopamine in dependable areas of the brain
No, at hand is undeniably no correlation between the two.
There's in truth a equal amount of research anyone done right immediately exploring this cross-question. I don't believe that any reliable source have however found a nouns.
The problem near fibromyalgia is that near is a large amount of information available---very little of which is peer-reviewed. It's very difficult to winnow out the point information from the second-hand goods "science."