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3 answers

Probabely several, but the current thinking is that seratonin may be the culprit.

2007-02-03 14:26:33 · answer #1 · answered by rwill54287 3 · 0 0

And may be caused by histamine?

2007-02-03 23:09:55 · answer #2 · answered by jelmar106 5 · 0 0

http://www.neurologyreviews.com/feb04/nr_feb04_foramen.html

2007-02-04 00:05:49 · answer #3 · answered by Anonymous · 0 0

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