Anagrelide as a New Platelet-Lowering Agent in Essential Thrombocythemia: Mechanism of Action, Efficacy, Toxicity, Current Indications - Tefferi, Ayalew; Silverstein, Murray N; Petitt, Robert M; Mesa, Ruben A; Solberg, Lawrence A., JR. (Seminars in Thrombosis and Hemostasis, 1997)