Various authors have requested that the following changes be made in their published papers: FORD, A. B., AND HELLERSTEIN, H. K.: Work and heart disease. I. A physiologic study in the factory. Circulation 18: 823, 1958. On page 831, line 13, should read ". . . workers may expend energy at a higher rate off the job than on it."
© 1959 American Heart Association, Inc.
Errata
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