ring chromosome 22
... that one of the first recorded cases of the rare genetic disorder ring chromosome 22 was in a pair of identical twins?
... that one of the first recorded cases of the rare genetic disorder <b id="mwAkw"><a href="./Ring_chromosome_22" id="mwAk0" rel="mw:WikiLink" title="Ring chromosome 22">ring chromosome<span id="mwAk4" typeof="mw:Entity"> </span>22</a></b> was in a pair of identical twins?