The 1983 Comprehensive Blood Bank Survey of the College of American Pathologists.

Approximately 2,800 laboratories participated in the 1983 Comprehensive Blood Bank Survey of the College of American Pathologists. Sixteen reference laboratories participated to validate the results and provide a referee consensus for grading of antibody studies. Participant consensus was used to evaluate ABO, Rh, and crossmatching results. Ungraded antigen typing results are included as well as discussions of the ungraded additional challenges and supplementary questions. Accuracy of participant results remains high on these surveys.