About the Authors

Chris Beyrer

To whom correspondence should be addressed. E-mail:cbeyrer@jhsph.edu

Voravit Suwanvanichkij
Luke C Mullany
Adam K Richards
Nicole Franck
Aaron Samuels
Thomas J Lee

Competing Interests

The authors declare that they have no competing interests. The external funder did not play a role in the decision to submit this paper or in its preparation.