<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>18797</termId><termName>neurobiology</termName><termType>PT</termType><termCreatedDate>0000-00-00 00:00:00</termCreatedDate><relation><relationType>BT</relationType><termId>19183</termId><termName>biology</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>20007</termId><termName>neuroscience</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>18746</termId><termName>neurons</termName><termType>PT</termType></relation></term>  </Zthes>