Misleading Headings.—In the article entitled "Calcium, Phosphorus, Magnesium, and Calcitonin Concentrations in the Serum and Cerebrospinal Fluid of Children," published in the July issue of AJDC (1987;141:751-753), the headings in Table 1 were misleading. On page 752, in Table 1, the major heading "Concentrations, mmol/L (mg/dL)†" should have been deleted, and the remaining headings should have read as follows: "Patient Group," "Serum Concentration, mmol/L (mg/dL)†," and "CSF Concentration, mg/dL†."