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This article has a correction. Please see:

John Snow’s theory of rickets


John Snow’s theory of rickets

Publication history

  • First published January 21, 2004.
Online issue publication 
January 21, 2004
  • Author Correction

    Please note that in this article the composition of alum is given as potassium aluminium phosphate. In fact, alum contains sulphate, not phosphate.

    The error is much regretted.

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