hosted at

Collaborative forms of work such as extended networks, expert groups, and con-sortia increasingly structure biomedical activities. They are particularly promi-nent in the cancer field, where procedures such as multicenter clinical trials have been instrumental in establishing the specialty of oncology, and subfields such as cancer genetics, where bioclinical activities—for example, testing for breast and ovarian cancer (BRCA) genes and follow-up interventions—are predicated on the articulation of a number of tasks performed by new clinical collectives. In this article, we examine the founding and development of a French bioclinica