Funding for this research was provided by:
U.S. Department of Health and Human Services (HITEP130003-01-00)
National Institute of Mental Health (T32 MH013043)
Deutsche Stiftung für Herzforschung (GR 4302/1-1)
Received: 3 March 2015
Accepted: 21 September 2015
First Online: 26 September 2015
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.
: Participants in the study provided oral informed consent. Oral informed consent was employed instead of written informed consent because all interviews were conducted over the telephone. Interviewers documented participants’ informed consent in the study database. This approach to obtaining informed consent, as well as all other study procedures, was approved by the institutional review board of Columbia University.