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2. Do proficiency testing participants learn from their mistakes?;Robert;Arch Pathol Lab Med,2002
3. The contribution of proficiency testing to improving laboratory performance and ensuring quality patient care;Johnson;Clin Leadersh Manag Rev,2004
4. Outliers in clinical chemistry quality-control schemes;Healy;Clin Chem,1979
5. Detection of outliers in the results of external quality assessment;Moller;EQAnews,2000