HUNTER HEATH III, M.D.
To the editor: I was interested in the report of Swinton, Clerkin, and Flint in the March 1972 issue (p. 455) regarding correction of hypercalcemia after resection of a pheochromocytoma in a 12-year-old boy. However, it seems odd that the authors did not mention the method by which the serum calcium level was measured or offer data concerning their "normal range" for the serum total calcium. Since the serum calcium values are the crux of the paper, it seems that such information should have been given.
In the clinical laboratory at Walter Reed General Hospital the "normal range" for serum
HEATH H. What Is "Normal" Serum Calcium?. Ann Intern Med. ;77:329–330. doi: 10.7326/0003-4819-77-2-329
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Published: Ann Intern Med. 1972;77(2):329-330.
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