About the Authors

Melissa E. Stauffer

melstauff@charter.net

Affiliation SCRIBCO, Effort, Pennsylvania, United States of America

Tao Fan

Affiliation Merck & Co., Inc., Whitehouse Station, New Jersey, United States of America

Competing Interests

The authors have the following interests. This study was funded by Merck & Co., Inc., the employer of Tao Fan. Melissa Stauffer received remuneration from SCRIBCO to perform the work described in this manuscript. There are no patents, products in development or marketed products to declare. This does not alter our adherence to all the PLOS ONE policies on sharing data and materials, as detailed online in the guide for authors.

Author Contributions

Conceived and designed the experiments: TF MS. Analyzed the data: MS. Wrote the paper: MS.