 - Exclusion related to prior drug treatments: Intake of oral corticosteroids within 7 days 10 milligram mg per day prior to first SCR visit; Use of depot corticosteroids within 7 days prior to first SCR visit; Subjects who are taking anticoagulants e.g. warfarin must not be on warfarin within 21 days prior to SCR. Subjects who are having psoralen combined with ultraviolet A PUVA treatment must not be using PUVA treatment within 21 days prior to SCR. 