Just to clarify, we do not titer our A plasma. It was considered but we decided not to. Been using A FFP emergently for years (that's our facility linked earlier) without problems. It definitely helps preserve your AB inventory. And we did not apply for a variance. I think we may have done some studies and found very low anti-B titers anyway so didn't need to continue. I suspect our rationale includes the generally low anti-B titers we saw, the lower prevalence of group B and AB in the population as well as the generally low number of B antigens on group B and AB red cells. All that said, we are titering our group O platelets for anti-A, and if its over 200 the platelet is tagged "transfuse to group O only." And we're working on a new whole blood for trauma protocol, it'll be group O only and we'll test the anti-A and anti-B titers. I don't recall what our cutoff there will be.