Probability of being alive on or off immunosuppression (IS) medications among patients who developed limited or extensive chronic GVHD. Overall incidence of chronic GVHD (dotted line); patients who died while on IS medications (black solid line); and patients alive who discontinued all IS medications (gray solid line) after developing chronic GVHD. The distance between the black and solid lines represents patients who are alive and still on IS medications (see also “Long-term immunosuppression”).