<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">
<mml:mrow> <mml:mi mathvariant="normal">Interval</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mi mathvariant="normal">peak</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mi mathvariant="normal">z-score</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mo>=</mml:mo>
<mml:mspace width="0.25em"/>
<mml:mfenced close=")" open="("> <mml:mrow> <mml:mi mathvariant="normal">reflex</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mi mathvariant="normal">window</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mi mathvariant="normal">peak</mml:mi>
<mml:mspace width="0.25em"/>
<mml:mo>-</mml:mo>
<mml:mspace width="0.25em"/>
<mml:mi mathvariant="normal">baseline</mml:mi>
</mml:mrow>
</mml:mfenced>
<mml:mo stretchy="true">/</mml:mo>
<mml:mi mathvariant="normal">baseline</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mi mathvariant="normal">standard</mml:mi>
<mml:mspace width="0.5em"/>
<mml:mi mathvariant="normal">deviation</mml:mi>
</mml:mrow>
</mml:math>