Well, (drumroll please) is my answer from CAP:
COM.04250 is for comparing test results. I do suggest comparing the antibody screen and ID for the different methods used in your laboratory.
Thank you,
Amy Meier, MBA, MT(ASCP)
Technical Manager, Laboratory Accreditation Program
So I guess I will be figuring out how to have adequate sample for comparability studies across 3 methods with tube being the problem child