About the Authors
Independent consultant, La Londe les Maures, France
Food and Drug Administration, Rockville, Maryland, United States of America
Battelle Memorial Institute, Columbus, Ohio, United States of America
The authors have declared that no competing interests exist.
Conducted literature review: FTC. Analyzed the data: FTC DAR. Wrote the first draft of the manuscript: FTC DAR. Contributed to the writing of the manuscript: FTC HSI DAR. ICMJE criteria for authorship read and met: FTC HSI DAR. Agree with manuscript results and conclusions: FTC HSI DAR.