<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>19227</termId><termName>cesarean section</termName><termType>PT</termType><termCreatedDate>0000-00-00 00:00:00</termCreatedDate><relation><relationType>BT</relationType><termId>19278</termId><termName>obstetrical   surgery</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>18352</termId><termName>epidural anesthesia</termName><termType>PT</termType></relation></term>  </Zthes>