A Phase 1/2 study (NCT03395210) investigating Sanofi (Nasdaq:SNY) Bruton tyrosine kinase inhibitor rilzabrutinib in immune thrombocytopenia (ITP) has also shed light on the cognitive impairment involved in the disease. Patients with ITP, an autoimmune disease that involves increased platelet destruction, have often complained of fatigue, problems with cognition and other symptoms that physicians have dismissed,…