About the Author
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 manuscript: VB. Contributed to the writing of the manuscript: VB MW JC PS EV. ICMJE criteria for authorship read and met: VB MW JC PS EV. Agree with manuscript results and conclusions: VB MW JC PS EV.