About the Authors

Chen Sun

Affiliation Laboratory of Cell Biology, Division of Monoclonal Antibodies, Office of Biotechnology Products, Center for Drug Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland, United States of America

Hui Fang

Affiliation Laboratory of Cell Biology, Division of Monoclonal Antibodies, Office of Biotechnology Products, Center for Drug Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland, United States of America

Tao Xie

Affiliation Laboratory of Cell Biology, Division of Monoclonal Antibodies, Office of Biotechnology Products, Center for Drug Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland, United States of America

Roger D. Auth

Affiliation Laboratory of Cell Biology, Division of Monoclonal Antibodies, Office of Biotechnology Products, Center for Drug Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland, United States of America

Nayana Patel

Affiliation Department of Laboratory Medicine, Warren Magnusen Clinical Center, National Institutes of Health, Bethesda, Maryland, United States of America

Patrick R. Murray

Current address: BD Diagnostics, Sparks, Maryland, United States of America

Affiliation Department of Laboratory Medicine, Warren Magnusen Clinical Center, National Institutes of Health, Bethesda, Maryland, United States of America

Philip J. Snoy

† Deceased.

Affiliation Division of Veterinary Services, Center for Biologics Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland, United States of America

David M. Frucht

david.frucht@fda.hhs.gov

Affiliation Laboratory of Cell Biology, Division of Monoclonal Antibodies, Office of Biotechnology Products, Center for Drug Evaluation and Research, United States Food and Drug Administration, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CS HF TX PM DF. Performed the experiments: CS HF TX RA NP PS. Analyzed the data: CS HF TX RA NP PM PS DF. Contributed reagents/materials/analysis tools: PM PS DF. Wrote the paper: CS TX DF.