Tyler J VanderWeele1, Alexandra E Shields2. 1. Harvard T.H. Chan School of Public Health, Department of Epidemiology, Program on Integrative Knowledge and Human Flourishing, Harvard University, National Consortium on Psychosocial Stress, Spirituality, and Health, United States. Electronic address: tvanderw@hsph.harvard.edu. 2. Harvard Medical School, Harvard/MGH Center on Genomics, Vulnerable Populations, and Health Disparities, National Consortium on Psychosocial Stress, Spirituality, and Health, United States.