About the Authors

Sripad Ram

Roles Conceptualization, Data curation, Formal analysis, Investigation, Project administration, Software, Validation, Visualization, Writing – original draft, Writing – review & editing

Sripad.ram@pfizer.com

Affiliation Drug-Safety Research and Development, Pfizer Inc., San Diego, California, United States of America

Pamela Vizcarra

Roles Methodology

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Pamela Whalen

Roles Data curation, Methodology, Writing – original draft

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Shibing Deng

Roles Formal analysis

Affiliation Biostatistics Unit, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

C. L. Painter

Roles Methodology

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Amy Jackson-Fisher

Roles Methodology, Resources

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Steven Pirie-Shepherd

Roles Resources

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Xiaoling Xia

Roles Data curation, Formal analysis

Current address: Ventana Medical Systems, Tucson, Arizona, United States of America

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Eric L. Powell

Roles Formal analysis, Methodology, Resources, Writing – original draft, Writing – review & editing

Affiliation Tumor Morphology Group, Oncology Research and Development, Pfizer Inc., San Diego, California, United States of America

Competing Interests

SR, PV, PW, SD, CLP, AJF, SPS, XX and ELP were all employees of Pfizer when the work reported in this manuscript was conducted. XX is now an employee of Ventana Medical Systems. We can confirm that this does not alter our adherence to PLOS One policies on sharing data and materials”.