AMERICAN 301,770 American Society of Hematology Fortieth Annual Meeting, December 4-8, 1998 Miami Beach, FL. -Philadelphia : W.B. Saunders Co. a Division of Harcourt Brace and Co., 1998. - [4], 388 s. ; 28 cm. -(Blood, 0006-4971 , vol.92, suppl.1,pt.2)