About the Authors
Monell Chemical Senses Center, Philadelphia, Pennsylvania, United States of America
The study was funded by a commercial source: Proctor & Gamble Beauty. Nonetheless, the funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. There are no other relevant declarations with respect to employment, consultancy, patents, products in development or marketed products and this funding source does not alter the authors' adherence to all of the PLOS ONE policies on sharing data and materials.
Conceived and designed the experiments: PD CM TW CJ. Performed the experiments: CM TW CJ. Analyzed the data: PD CM. Wrote the paper: PD CM.