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To the Editor:
—I have somewhat tardily noticed the inquiry of Dr. Barron (The Journal, March 23, 1912, p. 880) regarding the possibility of recovery of patients whose blood shows 10 per cent. or less hemoglobin; and the value of the Tallqvist hemoglobin scale-book.In the work of the Commission for the Study of Anemia in Porto Rico, patients were not infrequently encountered showing 10 per cent. or less hemoglobin, and recovery usually followed the expulsion of their parasites—the Necator americanus, the so-called hookworm. Several such cases were reported by Ashford and King (A Study of Uncinariasis in Porto Rico, Am. Med., v. 6, (10 and 11) Sept. 5 and 12, 1903, pp. 391-396 and 431-438), and in the report of the above commission, "Anemia in Porto Rico," Dec. 1, 1904.We used the von Fleischl hemoglobinometer in our routine estimations of hemoglobin, but also compared several other instruments with
King WW. The Prognosis of Low Hemoglobin Content. JAMA. 1912;LIX(4):292–293. doi:10.1001/jama.1912.04270070291026
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