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The SI Units in the box accompanying the article by Lehmann and colleagues (1) should read as follows:
Traditional: 0-130 U/L
U/L x 0.01667
SI: 0-21.6 µkat/L
The conversion factor was not correct in the July 1 issue (1).
Correction: SI Units. Ann Intern Med. 1992;117:349. doi: https://doi.org/10.7326/0003-4819-117-4-349
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Published: Ann Intern Med. 1992;117(4):349.
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