- Preexisting psychiatric conditions; especially severe depression, or a history of severe psychiatric disorder, such as major psychoses, active suicidal ideation and/or suicidal attempt are excluded. Patients with a history of mild depression may enter the protocol if they meet the following eligibility criterion and are monitored more intensively. Mild depression includes either situational depression for a limited period or depressive symptoms, which do not significantly interfere with the patient's work or daily functions. All patients will complete the Center for Epidemiological Studies Depression Scale (CES-D). The CES-D is a 20-item self-report scale designed to measure depressive symptomatology experienced during the week prior to the interview. The items are scored on a four-point scale (0-3), with the total score ranging from zero to 60. CES-D scores of 16-20 suggest minor depression, and scores greater than 20 suggest major depression. The score can be determined in real time. A score of 16 or higher should prompt further questioning and consideration of treatment or referral to psychiatry. Detailed follow-up of each patient may be individualized according to his/her need; this would usually include predetermined visits.