SCA1
... that SCA1 was the first genetic defect found to cause ataxia?
... that <b id="mwARU"><a href="./Spinocerebellar_ataxia_type_1" id="mwARY" rel="mw:WikiLink" title="Spinocerebellar ataxia type 1">SCA1</a></b> was the first genetic defect found to cause <a href="./Ataxia" id="mwARc" rel="mw:WikiLink" title="Ataxia">ataxia</a>?