About the Authors
PLOS Medicine, Cambridge, United Kingdom
VB's competing interests are at http://www.plosmedicine.org/static/editor sInterests.action. PLOS is funded partly through manuscript publication charges, but VB is paid a fixed salary (her 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. ICMJE criteria for authorship read and met: VB. Agree with manuscript results and conclusions: VB.