“The growth of interest in this work is most encouraging.  Dr. Fitzgerald and other physicians using zone therapy in their practice, have had scores of letters from patients they have never seen, but who have written, expressing their appreciation for the relief secured through instructions from some of their patients or through following out some suggestion from articles in the magazines.

I have reason to believe that there are now upwards of five hundred physicians, osteopaths and dentists, using these methods every day, with complete satisfaction to themselves and to their patients.

And the number of laymen, and especially laywomen, who are preaching the doctrine in their own households, and among their circle of friends, must be legion.  The adoption of the method is attended with absolutely no danger or disagreeable results, and may be the means of lengthening short lives and making good health catching.  I, for one hope that the number of those who may be inclined to learn and practice these methods upon themselves and upon members of their families may ever increase and multiply.  For this is a big idea.  And, a helpful one.  Therefore, the more who make it their own the better for the human race.”