Abstract
In 1947 Belk and Sunderman1 presented the results of a study of the quality of performance of clinical laboratories. Since that time a plethora of papers have appeared in the medical and scientific literature verifying, amending and extrapolating the observations made in that publication. These studies differ from each other in approach, scope and statistical manipulation, but the conclusions, for the most part, are the same; clinical laboratory test results, unfortunately, are not always reliable. Another addition to the voluminous literature on this subject appears elsewhere in this issue of the Journal. One conclusion to be drawn from the . . .

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