and until more is known about the neurobiology of mental states, neither of those conditions is now formally classified as an anxiety disorder, although they are often referred to as such.

Anxiety triggers the release of stress hormones ... (2007). Physiology and neurobiology of stress and adaptation: central role of the brain. Physiological Reviews, 87(3), 873–904.

"The idea is that if we know the neurobiology involved ... have significant potential to alleviate symptoms of anxiety, ...