<qa>  What is the duration of the 12-week evaluations?Patients will return to the study center at the end of the 12-week treatment period for the follow-up evaluation. After the 12-week evaluations, patients will be tapered off citalopram or placebo within 2 weeks. Tapering and discontinuation of the study medication or placebo will be done on a gradual basis e.g., If the patient is on 30 mg, she could take 20 mg for 1 week, 10 mg for one week, then DC. If, following the 12-week participation in the treatment protocol and the 1-2 week taper period, subjects have recurrent symptoms that are distressing to them or believe they need medication to keep their symptoms from recurring they will be evaluated clinically. 