Footnotes

• Contributors MP developed the initial idea for the commentary. JN and FL completed a literature review supporting the commentary. All authors wrote and reviewed sections of the paper and contributed to the table.

• Disclaimer The findings and conclusions in this report are those of the authors and do not necessarily represent the official position of the CDC. All authors met the following conditions: (1) substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data; (2) drafting the article or revising it critically for important intellectual content; and (3) final approval of the version to be published.

• Competing interests None.

• Provenance and peer review Commissioned; internally peer reviewed.