"Characterization of Laboratory Practice in CD4⁺ T-Cell Testing Laboratories by On-site Observation."

According to an abstract submitted by the authors to the 3rd Conference on Retroviruses and Opportunistic Infections, held January 28 - February 1, 1996, in Washington, DC, "The CDC Model Performance Evaluation Program (MPEP) for CD4⁺ T-cell testing includes estimates of performance levels derived from voluntary participant laboratory testing of performance evaluation panels and descriptions of laboratories and their procedures based on self-administered survey questionnaires. To estimate the reliability of self-administered survey results and to provide an independent source of information about CD4⁺ T-cell testing laboratories, the CDC MPEP developed and pilot...

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