span><span  title="" class="an ">&ensp;</span>induced <span  title="" class="an ">&ensp;</span>nociceptive <span  title="" class="an ">&ensp;</span>transduction <span  title="" class="an ">&ensp;</span>and <span  title="" class="an ">&ensp;</span>pain <span  title="" class="an ">&ensp;</span>has <span  title="" class="an ">&ensp;</span>been <span  title="" class="an ">&ensp;</span>attributed <span  title="" class="an ">&ensp;</span>to <span  title="" class="an ">&ensp;</span>ionotropic <span  title="" class