But the Oxford team disputed these findings and said either previous trials may have been interpreted incorrectly , those taking part were not given special diets beforehand or the duration of the studies may have been too short .
<response> But the <location>Oxford</location> team disputed these findings and said either previous trials may have been interpreted incorrectly , those taking part were not given special diets beforehand or the duration of the studies may have been too short . </response>