Prior to this checklist item, we only did a blood type on the patient specimen and reconfirmed the auto unit, then with no further testing other than clerical, allocated the auto unit to the patient. Because of this new checklist item, we also changed our SOP to include a crossmatch and antibody screen. The consensus here in San Diego, among the majority of hospitals queried is to treat an autologous unit like an allogeneic unit, with both the Antibody screen and crossmatch performed.