<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31798</termId><termName>Vacuna antivariólica</termName><termType>TT</termType><termCreatedDate>2014-09-15 20:32:44</termCreatedDate><relation><relationType>UF</relationType><termId>31799</termId><termName>Vacuna contra la viruela</termName><termType>ND</termType></relation><relation><relationType>UF</relationType><termId>31800</termId><termName>Vacuna variólica</termName><termType>ND</termType></relation><relation><relationType>RT</relationType><termId>10951</termId><termName>Viruela</termName><termType>PT</termType></relation></term>  </Zthes>