At the end of 4 weeks, all study patients in both groups will be given the opportunity to take melatonin before going to sleep at night for an additional 4 weeks. If you choose not to continue on melatonin for an additional 4 weeks, you will be taken off study and blood will be drawn for your end of study tests which include albumin, C-reactive protein (CRP), thyroid stimulating hormone (TSH), vitamin B-12, and cortisol. These tests will require about 1-2 tablespoons of blood to be drawn. If you choose to continue on melatonin for an additional 4 weeks, you will be asked to return to the outpatient clinic at Week 6 to repeat the tests done at baseline.