<qa>  How many teaspoons of blood will you have every 1-2 weeks during the first 4 weeks ofEvery 1-2 weeks during the first 4 weeks of the study, you will have around 2 teaspoons of blood drawn for routine blood tests and to measure the amount of imatinib in your blood. The blood tests will then be repeated every 6 to 8 weeks or more often if your doctor feels it is necessary for as long as you are on the study. A bone marrow sample will also be taken every 3 months for the first year and then every 4 to 6 months for as long as you are on the study to check on the status of the disease . 