lass="an ">&ensp;</span>recombinant <span  title="" class="an ">&ensp;</span>and <span  title="" class="an ">&ensp;</span>endogenous <span  title="" class="an ">&ensp;</span>rat <span  title="" class="an ">&ensp;</span>vanilloid <span  title="" class="an ">&ensp;</span>receptors <span  title="" class="an ">&ensp;</span>Anandamide <span  title="" class="an ">&ensp;</span>an <span  title="" class="an ">&ensp;</span>endogenous <span  title="" class="an ">&ensp;</span>lipid <span  title="" class="an ">&ensp;</s