Platelet count >= 100,000/ul Platelet count >= 100,000/mm Platelet (PLTs) count >= 100,000/mm^3 obtained =< 21 days prior to registration Platelet greater than or equal to 100,000/mcl Platelet count >= 100,000/uL Platelet count >= 100,000/uL Platelet count >= 100,000 cells/mcL Platelet count >= 100,000/mm^3 Platelet count > 100,000 Platelet count >= 100,000/mL within 28 days prior to registration Platelet count < 100 x 10^9/L Platelet count > 100,000/mm^3 Platelet count >= 50 x 10^9/L Platelet count >= 100,000/mm^3 Platelet count >= 100,000 mcl obtained within 28 days prior to sub-study registration Platelet count >= 100 x 10^9/L Platelet count >= 100 x 10^9/L measured within 28 days prior to randomization Platelet count >= 100,000/mm^3 Platelet count >= 100,000/mcL Platelet count > 50,000/mm^3 Platelet count >= 100,000/uL; Note: no transfusions are permitted 7 days prior to laboratory studies to determine eligibility Platelet count >= 100,000/mm^3 Platelet count >= 100,000/uL, obtained within 4 weeks prior to randomization Platelet count >= 100,000/uL Within 6 weeks prior to randomization: Platelet count must be >= 100,000/mm^3 Platelet count >= 100,000/mm^3 Re-registration: platelet count >= 100,000/mm^3 Platelet count >= 100,000/mm^3 Platelet count >= 100,000/mm^3 Platelet count >= 100,000/mm^3 Platelet count >= 100,000/ mL within 21 days prior to registration Platelet count >= 100,000/mm^3 CLINICAL/LABORATORY CRITERIA: Platelet count >= 100,000/mcL; these results must be obtained within 28 days prior to registration Platelet count must be >= 100,000/mm^3 within 28 days before randomization Platelet count >= 100,000/mm^3, within 4 weeks of randomization Platelet count >= 100,000/mm^3 Platelet count < 100 x 10^9/L