Fig. S1.

B7-H1 prolongs survival of OSE mice. Survival of OSE^WT and OSE^KO mice was monitored over a period of 140 d after birth. Mice were recorded as dead when clinical score 5.5 or higher was reached; mice eliminated for reasons unrelated to disease course (all with score below 5.5) were censored. In the OSE^WT group, 246 mice were analyzed (102 deaths, 144 censored); in the OSE^KO group, 216 mice were analyzed (116 deaths, 100 censored). Distribution of death and censored events over the observed period is shown, grouped by genotype.