FLOW CYTOMETRY PRINCIPLES FOR CLINICAL LABORATORY PRACTICE Quality Assurance for Quantitative Immunophenotyping Marilyn A. Owens and Michael R. Loken Flow Cytometry Principles for Clinical Laboratory Practice is an invaluable benchtop reference and introduction for first-time users of flow cytometry in clinical diagnostic laboratories. This manual provides authoritative coverage of accepted methods, quality controls, and standards for the cytometric analysis of clinical samples with particular relevance to CD4+ lymphocytes. CD4+ lymphocyte determination by immunophenotyping is the standard method for evaluating the status of HIV infection, and the single most frequent application of flow cytometry in a diagnostic setting. Flow Cytometry Principles for Clinical Laboratory Practice will appeal