Absolute neutrophil count (ANC) >= 1,000/uL Granulocytes >= 1,500/ul Absolute neutrophil count (ANC) > 750/uL Absolute neutrophil count (ANC) >= 1000/uL Absolute neutrophil count (ANC) >= 1,500/uL Absolute granulocytes >= 1500 cells/uL (1.5 x 10^9 L) Peripheral absolute neutrophil count (ANC) >= 1,000/uL Peripheral absolute neutrophil count (ANC) >= 750/uL Absolute neutrophil count >= 1,000/uL (unsupported), within 14 days of registration and within 7 days of the start of treatment Absolute neutrophil count (ANC) >= 1000/uL CD4 count >= 50 cells/ul Absolute neutrophil count (ANC) >= 1500/uL Absolute neutrophil count (ANC) >= 1,200/ul Absolute neutrophil count >= 1,500/uL Absolute neutrophil count >= 1500/ul TUMOR BIOPSY SEQUENCING: Absolute neutrophil count >= 1,000/uL (mcL) TREATMENT: Absolute neutrophil count >= 1,000/uL (mcL) Absolute neutrophil count (ANC) >= 1000/ul (unsupported) Absolute neutrophil count (ANC) >= 1500/uL Absolute neutrophil count (ANC) >= 1000/uL Absolute neutrophil count >= 1,500/uL Absolute neutrophil count >= 1500/uL; Note: no transfusions are permitted 7 days prior to laboratory studies to determine eligibility Absolute neutrophil count (ANC) >= 1,200/ul Granulocytes >= 1,500/ul Absolute neutrophil count (ANC) >= 1,500/uL, obtained within 4 weeks prior to randomization Absolute neutrophil count (ANC) >= 1,500/ul Absolute neutrophil count (ANC) >= 1,500/uL Absolute neutrophil count >= 1,500/uL Absolute neutrophil count >= 1000 cells/uL INCLUSION CRITERIA FOR STRATUM C: Absolute neutrophil count >= 1000 cells/uL Absolute neutrophil count >= 1,500/uL Absolute neutrophil count > 1,500/uL Absolute neutrophil count >= 1,500/uL Absolute CD4 count > 200 cells/uL Peripheral absolute neutrophil count (ANC) >= 750/uL Absolute neutrophil count (ANC) > 1,500/uL CD4+ T-cell count >= 100 cells/uL Peripheral absolute neutrophil count (ANC) >= 1000/uL Peripheral absolute neutrophil count (ANC) >= 1000/uL for patients with solid tumors without bone marrow involvement Peripheral absolute neutrophil count (ANC) >= 750/uL for patients with solid tumors and known bone marrow metastatic disease Absolute neutrophil count (ANC) >= 1500/uL Absolute lymphocyte count (ALC) >= 800/uL Absolute neutrophil count >= 1,500/uL