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American Journal of Epidemiology Vol. 141, No. 9: 886
Copyright © 1995 by The Johns Hopkins University School of Hygiene and Public Health

correction

ERRATUM

ABSTRACT

Dr. S. D. Walter has informed the Journal that Prof. Knut Laake of the University of Oxford has brought to his attention two typographic errors that appeared in Dr. Walter's article, "Calendar Effects in the Analysis of Seasonal Data" (Am J Epidemiol 1994;140:649–57).

Dr. Walter explains that on p. 656, in the Appendix, the third displayed equation should read


Formula

and that, also on p. 656, in the text immediately following the equation, the sentence that begins "Alternatively" should read:

"Alternatively, T = 8Nd2, where d is the distance of C from O."

Dr. Walter notes that equivalent forms of these basic equations are stated correctly in the text of his article as equation 1 at the bottom of p. 650 and in the second line of text on p. 651. He says that the correct equations were used to calculate the numerical results of the paper, which are thus unaffected by the above corrections.


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