 After signing the volunteer informed consent, the tests and scales will be administered and patients will be randomized to receive a 12-week course of citalopram or placebo. Female participants of childbearing potential will be given a serum pregnancy test up to 1 tablespoon prior to being randomized to the study medication. If the result of this test is positive, she will not be allowed to participate in this study. The study physician will discuss alternative treatment options. 