This study is an extension of earlier work Dr. Rasgon has done with Dr. Elizabeth Blackburn at UCSF on the relationship between telomere length and mood outcomes. The investigators hope this study will add to the growing body of literature on stress and genetic markers of longevity, specifically how stress level and type is associated with telomere length. The increased understanding gained through this study may provide leads for predicting age-related diseases and early mortality in adults, thus benefiting others in the future.