[stylist] writers and depression

[Vejas Vasiliauskas]

I've always found it interesting that many writers-Hemingway, 
Dickens, Huxley and many of the Lithuanian authors that I read 
when I used to go to Lithuanian school had depression.  Does 
anyone know why it is so common?
I'm thinking that maybe the concept of the writers having 
depression is a bit overplayed, and they could have just felt 
down some of the time.  I personally don't think that being a 
writer means you have it or vice-versa.
Just curious if anyone suspects a reason for this?
Vejas