I had a question about patient workups in the IRL. Do most IRLs use both gel and tube or one or the other? We were strictly a tube method IRL however most of our hospitals had gone to gel and we have now implemented gel as well. We have a lot of strange reactivity in gel that we cannot duplicate in tube. I know that there is not a 100% method of antibody detection but I was curious as to what other institutions are using. Thanks!!!!