Chimerism following haploidentical BMT with a conditioning regimen of ⁹⁰Y-anti-CD45 RIT, FLU, and/or CY. Mean percentage of CD8⁺ cells expressing the H-2D^d haplotype in peripheral blood from transplanted mice 28 days after BMT. Recipient mice were treated with 300 µCi ⁹⁰Y-DOTA-30F11 on day −3 alone, with FLU × 5 days (100 mg/kg per day on days −8 to −4), with CY (200 mg/kg per day on days −2 and +2), or with both FLU and CY.