Posted by Jack Boyd on April 23, 1999 at 18:04:08:
In Reply to: Re: AMA/Reuters / WOW -it's falling right into place posted by gary g on April 23, 1999 at 13:14:55:
None of the stuff you are considering is mutually exclusive. Seasonal/daylight induced chemical changes that affect blood vessels behind one eye - all brought on by a genetic predisposition.
You can even throw in the allergy component if one uses the term generically - a reaction to some stimuli - daylight/oxygen ( or lack of ).
I better quit while I am ahead.
There are causes and then there are causes.