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Additional Information

Competing Interests

Victoria S. S. Wong is an Academic Editor for PeerJ. Michael L. Callaham is paid a stipend by the American College of Emergency Physicians to edit

their peer reviewed journal.

Author Contributions

Victoria S S Wong conceived and designed the experiments, performed the experiments, analyzed the data, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Lauro N Avalos performed the experiments, wrote the paper, reviewed drafts of the paper.

Michael L Callaham performed the experiments, wrote the paper.

Human Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

This study was reviewed and approved by The Queen’s Medical Center Research & Institutional Review Committee, and qualified as exempt under the University of California, San Francisco Institutional Review Board.

Data Deposition

The following information was supplied regarding data availability:

For ethical reasons to maintain confidentiality.


The authors received no funding for this work.

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