C₃0 is a network of researchers in Europe and in the USA. It's focus is on gathering knowledge on spontaneously occurring tumors in companion animals and to translate experience from human as well as veterinary medicine to both serve the progress of cancer treatment in animal and man.

The affiliates are SLU, Karolinska Institutet, Broad Institute of MIT and Harvard, Linköping University, Uppsala University, Veterinary Cancer Society, National Veterinary Institute in Sweden.

The network is led from SLU (Swedish University of Agricultural Sciences).