J. SORBIE, M.D.; L. S. VALBERG, M.D.
To the editor: In his recent editorial (1) Dr. V. F. Fairbanks reviewed the tests available for iron deficiency. We are pleased that he gave favourable consideration to the new cobalt excretion test (2). Clinical trials of a 6-hour cobalt excretion test are well underway, and results indicate that this simple procedure is just as sensitive for detecting iron deficiency as the 24-hour test.
But Dr. Fairbanks overlooked one aspect of the test. He stated that the cobalt excretion test was unsuitable for identification of states of iron overload. It is true that in exogenous iron overload caused by blood
SORBIE J, VALBERG LS. Iron Deficiency, Iron Overload. Ann Intern Med. ;76:333–334. doi: 10.7326/0003-4819-76-2-333
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Published: Ann Intern Med. 1972;76(2):333-334.
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