1 Department of Social and Behavioral Sciences, Harvard T H Chan School of Public Health, Boston, MA 02215, USA. Electronic address: lkubzans@hsph.harvard.edu.
2 Department of Social and Behavioral Sciences, Harvard T H Chan School of Public Health, Boston, MA 02215, USA.
3 Department of Neurology, Massachusetts General Hospital, Boston, MA, USA.
4 Cardiac Psychiatry Research Program and Inpatient Medical Psychiatry Service, Massachusetts General Hospital, Boston, MA, USA.