Study concept and design: Nogueira, Koshiol, Ferreccio.
Acquisition, analysis, or interpretation of data: Nogueira, Foerster, Groopman, Egner, Koshiol, Ferreccio.
Drafting of the manuscript: Nogueira, Foerster, Groopman, Koshiol.
Critical revision of the manuscript for important intellectual content: Nogueira, Foerster, Egner, Koshiol, Ferreccio.
Statistical analysis: Nogueira, Koshiol.
Obtained funding: Koshiol.
Administrative, technical, or material support: Foerster, Groopman, Egner, Koshiol.
Study supervision: Foerster, Koshiol, Ferreccio.
Conflict of Interest Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported.
Funding/Support: This work was supported by general funds from the Intramural Research Program, National Institutes of Health, National Cancer Institute, Division of Cancer Epidemiology and Genetics (DCEG), CONICYT/FONDAP grant 15130011, and Fondo Nacional de Investigación y Desarrollo en Salud grant SA11I2205.
Role of the Funder/Sponsor: These funding sources had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation of the manuscript; and decision to submit the manuscript for publication. The DCEG did participate in the review and approval of the manuscript; however, the study authors functioned as investigators without direction or interference by DCEG.
Additional Information: The members of the Gallbladder Cancer Chile Working Group appear in the eList in the Supplement.
Correction: This article was corrected on June 9, 2015, to fix formatting in Table 2.