About the Authors
- Jin Xu
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Robert C. Spitale
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Affiliation Department of Pharmaceutical Sciences, University of California Irvine, Irvine, California, United States of America
- Linna Guan
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Ryan A. Flynn
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Eduardo A. Torre
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Rui Li
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Inbar Raber
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Kun Qu
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Dale Kern
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Affiliation Nu Skin International, Provo, Utah, United States of America
- Helen E. Knaggs
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Affiliation Nu Skin International, Provo, Utah, United States of America
- Howard Y. Chang
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Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
- Anne Lynn S. Chang
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* E-mail: alschang@stanford.edu
Current address: Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
Affiliation Department of Dermatology, Stanford University School of Medicine, Redwood City, California, United States of America
Competing Interests
Dale Kern and Helen Knaggs are employess of Nuskin. These competing interests do not alter our adherence to PLOS ONE policies on sharing data and materials.
Author Contributions
Conceptualization: JX RCS LG RAF EAT RL IR KQ DK HEK HYC ALSC. Data curation: JX RCS KQ. Formal analysis: JX RCS ALSC HYC LG. Funding acquisition: ALSC. Investigation: JX RCS LG RAF EAT RL IR ALSC. Methodology: JX RCS LG RAF EAT RL IR KQ DK HEK HYC ALSC. Project administration: LG ALSC. Resources: HEK DK ALSC. Software: KQ JX. Supervision: ALSC. Validation: JX. Visualization: ALSC. Writing – original draft: JX RCS LG RAF RL IR HYC ALSC. Writing – review & editing: JX RCS LG RAF EAT RL IR HYC ALSC.