Article History
Received: 27 May 2019
Accepted: 11 December 2019
First Online: 3 January 2020
Compliance with Ethical Standards
: Consent from all participants was obtained. The Stanford University Medical School Institutional Review Board granted expedited approval of this study because of the voluntary, anonymous nature of the project, posing minimal risk to participants.
: On behalf of all authors, the corresponding author states that there is no conflict of interest.