<qa>  How many blood tests will be drawn?Blood about 1 teaspoon will be collected for the evaluation of anti-AMG 531 antibody status at the end of Cycles 2 and 4. You will be taken off the study if your disease gets worse or intolerable side effects occur. The number of blood tests drawn will depend on your clinical condition. These samples about 1 teaspoon each will be taken at least 2 times a week and as often as once a day during anticipated periods of low blood cell counts. 