Long-Term Incidence of Hematological Evolution in Three French Prospective Studies of Hydroxyurea and Pipobroman in Polycythemia Vera and Essential Thrombocythemia - Kiladjian, Jean-Jacques; Rain, Jean-Didier; Bernard, Jean-Francois; Briere, Jean; Chomienne, Christine; Fenaux, Pierre (Seminars in Thrombosis and Hemostasis, 2006)