Spontaneous Erythroid Colony Formation as the Clue to an Underlying Myeloproliferative Disorder in Patients with Budd-Chiari Syndrome or Portal Vein Thrombosis - Stefano, Valerio De; Teofili, Luciana; Leone, Giuseppe; Michiels, Jan J (Seminars in Thrombosis and Hemostasis, 1997)