All about proficiency testing, its requirements as related to accreditation, and the PT process.
https://drive.google.com/file/d/1-Cc48uQWmW3uy2wS1hst8v8T3EvVqqRN/view?usp=sharing
Sources:
Clinical Chemistry: Techniques, Principles, Correlations. Michael L. Bishop, et. al.; 8th ed.
Linné and Ringsrud’s Clinical Laboratory Science: The Basics and Routine Techniques. 6th Edition. Mary Louise Turgeon