Funding

No sources of funding were used in the preparation of this letter.

Conflicts of Interest/Competing Interests

John J. Davis IV has no conflicts of interest that are relevant to this letter.

Availability of Data and Material

The data supporting this analysis are available at https://github.com/johnjdavisiv/ferritin-moderator-analysis.

Code Availability

The code supporting this analysis is available at https://github.com/johnjdavisiv/ferritin-moderator-analysis.

Author’s Contributions

JD wrote and revised the first draft of the letter, and read and approved the final version.