title: Why was package 'epicalc' removed from CRAN?
body: <p>Go to the link: </p>
  
  <p><a href="https://cran.r-project.org/web/packages/epicalc/index.html" rel="noreferrer">https://cran.r-project.org/web/packages/epicalc/index.html</a></p>
  
  <p>You will obtain the message:</p>
  
  <pre><code>Package ‘epicalc’ was removed from the CRAN repository.
  
  Formerly available versions can be obtained from the archive.
  
  Archived on 2015-05-12 as requested by the maintainer &lt;cvirasak@medicine.psu.ac.th&gt;.
  </code></pre>
  
  <p>But no further explanation is given.  This seems like a well developed and useful packages, so why has it been removed?</p>