Procedurally, PEER Online utilizes standard 21-lead digital electroencephalographic equipment measuring the patient in a resting (but awake) state. The recording generally takes 30-60 minutes. Patients are classified based upon the 1,142 variables calculated in the recording (FDA-approved neurometric system) and categorized based on the outcome history in treating patients with similar neurophysiologic outputs. From these outputs and the correlation to the outcome database, reports may indicate single or multiple medications based on the nature of the physiologic abnormality discovered. The entire procedure is rapid, non-invasive, devoid of radiation or high strength magnetic fields, and results in a report (the PEER Outcome Report) that is easily used by clinicians given its similarity in format to antibiotic sensitivity testing.