About the Authors

Weiguo Zhai

Affiliation Analytical Biochemistry, MedImmune, Mountain View, California, United States of America

Dan Ning Zhang

Affiliation Analytical Biochemistry, MedImmune, Mountain View, California, United States of America

Cecilia Mai

Affiliation Analytical Biochemistry, MedImmune, Mountain View, California, United States of America

Justin Choy

Affiliation Analytical Biochemistry, MedImmune, Mountain View, California, United States of America

Gary Jian

Affiliation Analytical Biochemistry, MedImmune, Mountain View, California, United States of America

Kuldip Sra

Affiliation Analytical Biochemistry, MedImmune, Mountain View, California, United States of America

Mark S Galinski

GalinskiM@Medimmune.com

Affiliation Vaccine Analytical Sciences, MedImmune, Mountain View, California, United States of America

Competing Interests

The authors have read the journal's policy and have the following conflicts. All of the authors worked for MedImmune. This does not alter the authors's adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: MSG. Performed the experiments: WZ DNZ CM JC GJ. Analyzed the data: WZ DNZ MSG. Contributed reagents/materials/analysis tools: DNZ CM JC GJ KS. Wrote the paper: WZ MSG.