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PERSPECTIVE| Volume 356, ISSUE 4, P315-318, October 2018

The S-Curve Discontinuity Theory Applied to Medicine to Explain Healthcare's Past and Predict Its Future

      Developed in 1845 by Verhulst, the logistic growth curve is an “S” shaped sigmoid curve referring to the self-limiting population growth in ecology. The initial growth stage is exponential, followed by slowing of growth as saturation begins and ending of growth at maturity. In geology, an uncertain period exists at the upper horizontal arm of the S-curve when a species utilizes its available resources and either extinction or evolution by natural selection results.
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