Clinical Applications of Flow Cytometry: Quality Assurance and Immunophenotyping of Lymphocytes: Approved Guideline. Wayne, PA: Clinical and Laboratory Standards Institute; 2007. H42-A2.

Defining, Establishing, and Verifying Reference Intervals in the Clinical Laboratory; Approved Guideline—Third Edition. Wayne, PA: Clinical and Laboratory Standards Institute; 2008. C28-A3.

Procedures for the Collection of Diagnostic Blood Specimens by Venipuncture; Approved Standard—Sixth Edition. Wayne, PA: Clinical and Laboratory Standards Institute; 2007. H3-A6.

Protection of Laboratory Workers from Occupationally Acquired Infections; Approved Guideline—Third Edition. Wayne, PA: Clinical and Laboratory Standards Institute; 2005. CLSI document M29-A3.

Ashmore LM, Shopp GM, Edwards BS. Lymphocyte subset analysis by flow cytometry. Comparison of three different staining techniques and effects of blood storage. J Immunol Methods. 1989;118:209-215.

Centers for Disease Control. Perspectives in disease prevention and health promotion update: universal precautions for prevention of transmission of human immunodeficiency virus, hepatitis B virus, and other bloodborne pathogens in health-care settings. MMWR. 1988;37:377-388.

de Paoli P, Reitano M, Battistin S, Castiglia C, Santini G. Enumeration of human lymphocyte subsets by monoclonal antibodies and flow cytometry: a comparative study using whole blood or mononuclear cells separated by density gradient centrifugation. J Immunol Methods. 1984;72:349-353.

Jackson A. Basic phenotyping of lymphocytes: selection and testing of reagents and interpretation of data. Clin Immunol Newslett. 1990;10:43-55.

Kidd PG, Vogt RF, Jr. Report of the workshop on the evaluation of T-cell subsets during HIV infection and AIDS. Clin Immunol Immunopathol. 1989;52:3-9.

Landay AL, Muirhead KA. Procedural guidelines for performing immunophenotyping by flow cytometry. Clin Immunol Immunopath. 1989;52:48-60.

Nicholson JK, Rao PE, Calvelli T, et al. Artifactual staining of monoclonal antibodies in two-color combinations is due to an immunoglobulin in the serum and plasma. Cytometry. 1994;18:140-146.

Prince HE, Hirji K, Waldbeser LS, Plaeger-Marshall S, Kleinman S, Lanier LL. Influence of racial background on the distribution of T-cell subsets and Leu 11-positive lymphocytes in healthy blood donors. Diagn Immunol. 1985;3(1):33-37.

Renzi P, Ginns LC. Analysis of T cell subsets in normal adults: comparison of whole blood lysis technique to Ficoll-Hypaque separation by flow cytometry. J Immunol Methods. 1987;98:53-56.

Romeu MA, Mestre M, González L, et al. Lymphocyte immunophenotyping by flow cytometry in normal adults: comparison of fresh whole blood lysis technique, Ficoll-Paque separation and cryopreservation. J Immunol Methods. 1992;154:7-10.