Article History
Received: 5 December 2017
Revised: 9 March 2018
Accepted: 15 March 2018
First Online: 30 March 2018
Compliance with Ethical Standards
:
: Karen Kim, Michael Quinn, and Helen Lam declare that they have no competing interest.
: This study was approved by the University of Chicago Institutional Review Board. All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000 (5). Informed consent was obtained from all participants for being included in the study.