important areas of functioning (Criterion E).
In determining whether the anxiety symptoms  are attributable to  another medical con-
dition, the clinician must first establish the presence of the medica l condition.  Further-
more, it must be established that anxiety symptoms can be etiologically related to the
medical condition through a physiological mech anism before making a judgment that this
is the best explanation for the symptoms in a specific individual. A careful and compre-