Probability of spontaneous occurrence of infectious dermatitis in P- and E-selectin double-deficient mice after bone marrow transplantation. Lethally irradiated P/E−/− recipient mice were reconstituted with either +/+, (□) or −/− (◊) bone marrow. Mice were periodically observed for the presence of dermatitis; n = 19. P = .31 (log-rank test).