Presentation of the anxious patient.
D000293:Adolescent; D000328:Adult; D001008:Anxiety Disorders / Q000145:classification / Q000150:complications / Q000175:diagnosis*; D002648:Child; D003866:Depressive Disorder / Q000175:diagnosis; D003937:Diagnosis, Differential; D006801:Humans; D006985:Hyperventilation / Q000209:etiology; D009771:Obsessive-Compulsive Disorder / Q000175:diagnosis; D010200:Panic; D012890:Sleep