A fasting blood sample will be drawn at Baseline, weeks 4 and 8 and every 8 weeks thereafter for BDNF assay. Blood samples collected at Baseline, week 24, and week 52 will be assayed for prolactin and inflammation markers. Blood samples collected at baseline, week 8, week 24, and week 52 will be assayed for C-Reactive Protein. Additionally, a blood sample for DNA will be collected at week 4. Saliva will be collected with tongue swabs at Baseline, Week 4, Week 8, Week 16, Week 24, Week 36, and Week 52 for cortisol analyses.