The ITP Support Association is a UK registered charity which aims to promote and improve the general welfare of patients, and the families of patients, with Idiopathic Thrombocytopenic Purpura. http://www.itpsupport.org.uk/

The Platelet Disorder Support Association is a non-profit corporation founded in August, 1998 to provide information, support, and encourage research about ITP and other platelet disorders. http://www.pdsa.org/aboutus.htm