About the Authors

Spencer B. Hermanson

Affiliation Primary and Stem Cell Systems, Life Technologies Corporation, Madison, Wisconsin, United States of America

Coby B. Carlson

Affiliation Primary and Stem Cell Systems, Life Technologies Corporation, Madison, Wisconsin, United States of America

Steven M. Riddle

Affiliation Primary and Stem Cell Systems, Life Technologies Corporation, Madison, Wisconsin, United States of America

Jing Zhao

Affiliation The Parkinson’s Institute, Sunnyvale, California, United States of America

Kurt W. Vogel

Affiliation Primary and Stem Cell Systems, Life Technologies Corporation, Madison, Wisconsin, United States of America

R. Jeremy Nichols

Affiliation The Parkinson’s Institute, Sunnyvale, California, United States of America

Kun Bi

Kun.Bi@lifetech.com

Affiliation Primary and Stem Cell Systems, Life Technologies Corporation, Madison, Wisconsin, United States of America

Competing Interests

Spencer Hermanson, Coby Carlson, Steve Riddle, Kurt Vogal and Kun Bi are employees of Life Technologies, which manufactures some of the products/tools used in this study. This does not alter the authors’ adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SH RJN KB. Performed the experiments: SH CC SR JZ RJN KB. Analyzed the data: SH CC SR JZ RJN KB. Contributed reagents/materials/analysis tools: SH CC SR JZ KV RJN KB. Wrote the paper: RJN KB.