SELP and myeloid sarcoma: By measuring the expression levels of P-selectin (Figs. 1b, c, 4) and GPIIb/IIIa (Figs. 2b, c, 5) and determining the fraction of circulating PA (Figs. 3b, c, 6) and PMPs (Figs. 4b, c, 6), we showed that platelets of patients with SP MS were fully functional, but exhibited an increased response to the agonists, characteristic of chronic activation.