CD8⁺cells from patients with acute MS exhibitincreased rolling on P-selectin in vitro. (A-C) CD4⁺ and CD8⁺ T cells were obtained from the blood of healthy donors and from patients with acute MS. Three patients were studied. Values are mean percentage of total interacting cells to an area of 0.2 mm² in 30 seconds. Results are from 1 of 3 representative experiments. Error bars are standard deviation values from at least 10 separate areas on the same capillary tube. Single areas of 0.2 mm² were recorded for at least 30 seconds. *P < .01.