Subjects will undergo a 14 week period from 22 Weeks to 36 Weeks (termed the Steroid Wean Phase) during which an attempt will be made to wean them off either their maintenance inhaled corticosteroids (ICS) or, if taking maintenance oral corticosteroids (OCS), their oral steroids. If a subject cannot tolerate the steroid reduction at a particular level (as evidenced by loss of asthma control), they will be stabilized on their last tolerable dose of steroid.