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To the Editor.—
In our manuscript entitled "Studies in Batten Disease: I. Peroxidase Deficiency in Granulocytes" (Arch Neurol 30:144-152, 1974), a shaded zone intended to designate control values was inadvertently omitted from Fig 4, and our efforts to supply a corrected figure were not included with the final publication. Figure 4 and its legend is herewith republished so proper comparison with Batten disease patients can be appreciated.