 4. If on corticosteroids, has been receiving a stable dose of less than or equal to 20 mgday of prednisone or equivalent dose, if other corticosteroid for at least 1 month 30 days prior to the AIR001-CS05 study BaselineDay 1 visit. If receiving treatment for Connective Tissue Disease CTD with any other drugs, doses should remain stable, if clinically feasible, for the duration of the AIR001-CS06 study. 