The above article highlights the insensitivity of urine microscopy compared with the Combur 9 test for detecting haematuria associated with urinary calculi. In the article, the equivalent microscopic RBC values for the Combur 9 are given as 5/ml (typo? it should be 5/µl) and 10 /ml (?10/µl) for intact RBCs and haemoglobin respectively.
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