On Day 5, if the patient's peripheral CD34+ cell count was 8 to 19 cells/µl (inclusive), then he/she underwent apheresis that day. If this apheresis yield was <1.3*10^6 CD34+ cells/kg, then the patient was predicted to be unlikely to collect ≥2*10^6 CD34+ cells/kg in ≥3 days of apheresis and received plerixafor (240 µg/kg) that evening. However, if the apheresis yield on Day 5 was ≥1.3*10^6 CD34+ cells/kg, then the patient did not enter the study.