Unlike many general contract research organizations (CRO)s, Certis has developed all its commercial tumor models from patient-consented tissue. Some models originate from personalized studies Certis has conducted for individual patients; others are developed from tissues or research models acquired through alliances with research institutions.

Most models in the Certis Tumor Bank have been developed from tissue acquired within the last five years in the US and have been pretreated with current standard-of-care therapies.