<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/schema/zthes-1.0.dtd">  <Zthes><term><termId>12717</termId><termName>COLECISTECTOMIA</termName><termType>PT</termType><termLanguage>es-ES</termLanguage><termVocabulary>TESAURO DE MATERIAS DE SERBIULA</termVocabulary>	<termStatus>active</termStatus>	<termApproval>approved</termApproval>	<termSortkey>COLECISTECTOMIA</termSortkey><termCreatedDate>COLECISTECTOMIA</termCreatedDate><relation><relationType>BT</relationType><termId>66809</termId><termName>CIRUGIA DE LA VESICULA BILIAR</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>9939</termId><termName>VESICULA BILIAR</termName><termType>PT</termType></relation></term>  </Zthes>