MPL and autoimmune thrombocytopenic purpura: The association between IPF and IPC and response to treatments, including thrombopoietin receptor agonists, has not been previously studied in children.<h4>Objectives</h4>This study evaluated the relationship among IPF, IPC, and treatment response in children with ITP.<h4>Methods</h4>This observational cohort study included 4 pediatric medical centers.