Data Sharing Requests

Per National Cancer Institute's National Clinical Trials Network (NCTN) guidelines, any investigator may submit a request for data from published Alliance or legacy American College of Surgeons Oncology Group (ACOSOG), Cancer and Leukemia Group B (CALGB), or North Central Cancer Treatment Group (NCCTG) trials.

To submit a data request, the investigator should complete an Alliance Data Sharing Request Form and send it by e-mail to Once received, the request will be forwarded to the Alliance Statistics and Data Management Center (SDMC) and the disease committee for the requested study. The SDMC will confirm the availability of the data. Once the SDMC confirms availability, the investigator will be sent a Data Release. Once the data release is received from the requesting investigator, the SDMC will be notified that the requested data may be released.

For Alliance-sponsored data requests involving an Alliance Statistician, the requesting investigator should first seek committee approval. All Cancer Control Program data-only studies should be submitted through the CCP Program Manager. 

Some data sets are already available through the NCTN Data Archive or Project Data Sphere.

Questions about the process can be directed to