About the Authors

Gregory P. Bisson

bisson@mail.med.upenn.edu

Affiliation University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

ICMJE criteria for authorship read and met: GPB. Agree with the manuscript's results and conclusions: GPB. Wrote the first draft of the article: GPB.