Response outcomes and duration of therapy in the HD and LD pomalidomide cohorts. Swimmer plot represents the duration of treatment of every individual subject in both study cohorts within the marked twelve 28-day cycles planned per protocol. The cGVHD evaluations are marked at corresponding 3-month time points, as are the time points of steroid pulses and average doses of pomalidomide per day in a cycle per patient’s diary for a corresponding cycle. F, female; M, male.