About the Authors

Begoña Comin-Anduix

bcomin@mednet.ucla.edu (BCA); aribas@mednet.ucla.edu (AR)

Affiliations Division of Surgical Oncology, Department of Surgery, University of California Los Angeles, Los Angeles, California, United States of America, Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, California, United States of America

Hooman Sazegar

Affiliation Division of Hematology/Oncology, Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Thinle Chodon

Affiliation Division of Hematology/Oncology, Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Douglas Matsunaga

Affiliation Division of Hematology/Oncology, Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Jason Jalil

Affiliation Division of Surgical Oncology, Department of Surgery, University of California Los Angeles, Los Angeles, California, United States of America

Erika von Euw

Affiliation Division of Surgical Oncology, Department of Surgery, University of California Los Angeles, Los Angeles, California, United States of America

Helena Escuin-Ordinas

Affiliation Division of Hematology/Oncology, Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Robert Balderas

Affiliation BD Biosciences, San Jose, California, United States of America

Bartosz Chmielowski

Affiliation Division of Hematology/Oncology, Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Jesus Gomez-Navarro

Current address: Millennium: The Takeda Oncology Company, Cambridge, Massachusetts, United States of America

Affiliation Pfizer Global Research and Development, New London, Connecticut, United States of America

Richard C. Koya

Affiliation Division of Surgical Oncology, Department of Surgery, University of California Los Angeles, Los Angeles, California, United States of America

Antoni Ribas

bcomin@mednet.ucla.edu (BCA); aribas@mednet.ucla.edu (AR)

Affiliations Division of Surgical Oncology, Department of Surgery, University of California Los Angeles, Los Angeles, California, United States of America, Jonsson Comprehensive Cancer Center, University of California Los Angeles, Los Angeles, California, United States of America, Division of Hematology/Oncology, Department of Medicine, University of California Los Angeles, Los Angeles, California, United States of America

Competing Interests

Robert Balderas is an employee of BD Biosciences, the company from which the authors purchased most of the antibodies and reagents for this work. Jesus Gomez-Navarro was an employee of Pfizer Inc, the maker of tremelimumab, at the time that this research was conducted. He now works at Millennium Pharmaceuticals. Antoni Ribas has received research funding and honoraria from Pfizer Inc, the maker of tremelimumab. However, these confilcts did not influence the conduct of the research described in this manuscript, nor the adherence to the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: BCA BC JGN RCK AR. Performed the experiments: BCA HS TC DM JJ EvE HEO RCK. Analyzed the data: BCA HS TC DM JJ RB BC JGN RCK AR. Contributed reagents/materials/analysis tools: BCA TC RB BC JGN RCK AR. Wrote the paper: BCA AR.