<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>18948</termId><termName>Investigacion medica (America)</termName><termType>PT</termType><termCreatedDate>1993-07-13 18:00:00</termCreatedDate><relation><relationType>BT</relationType><termId>13592</termId><termName>Investigacion medica</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>18947</termId><termName>Investigacion (America)</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>7666</termId><termName>Investigacion medica (Estados Unidos)</termName><termType>PT</termType></relation><relation><relationType>NT</relationType><termId>9278</termId><termName>Investigacion medica (Iberoamerica)</termName><termType>PT</termType></relation></term>  </Zthes>