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document.write('<th align=center>|&nbsp;<a href="index.html" class="tox">Principal</a>');
document.write('&nbsp;|&nbsp;<a href="toxicologia.html" class="tox">Questionário</a>');
document.write('&nbsp;|&nbsp;<a href="maconha.html"  class="tox">Maconha</a>');
document.write('&nbsp;|&nbsp;<a href="fumo.html"  class="tox">Fumo</a>');
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document.write('&nbsp;|&nbsp;<a href="links.html"  class="tox">Links de Toxicologia</a>&nbsp;|&nbsp;');


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