About the Authors
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The authors' individual competing interests are at http://www.plosmedicine.org/static/editorsInterests.action. PLoS is funded partly through manuscript publication charges, but the PLoS Medicine Editors are paid a fixed salary (their salary is not linked to the number of papers published in the journal).
Wrote the first draft of the paper: EV. Contributed to the writing of the paper: VB JC SJ LP.