1) Age greater than 18 years 2) WBC greater than 2000/mm3 with ANC greater than 500/mm3 3) Platelet count greater than 50,000/mm3 4) Hematocrit greater than 24 5) Life expectancy greater than 1 year as determined by investigator 6) Females must have a negative pregnancy test and any sexual partner must also agree to practice a barrier and/or hormonal method of birth control while participating in this study and for 90 days after. Females must agree to have a pregnancy test if a menstrual cycle is missed, and if positive, this must be reported.