definiens: shall mean a therapy using the 435 Compound and theIdenix Compound in combination, with or without ribavirin as the Parties shall agree, either administered separately or in anysingle mode of administration . The 2 - DAA Combined Therapy shall only be required to include the formulations of each ofthe 435 Compound and the Idenix Compound that are being developed by the Parties on the Effective Date.1.2 shall mean a therapy using the 435 Compound, theritonavir - boosted 055 Compound, and the Idenix Compound in combination, with or without ribavirin as the Parties shallagree, either administered separately or in any single mode of administration . The 3 - DAA Combined Therapy shall only berequired to include the formulations of each of the 435 Compound, 055 Compound and the Idenix Compound that are beingdeveloped by the Parties on the Effective Date