Johannes Fatio
... that Johannes Fatio performed the first successful separation of conjoined twins in 1689?
... that <b id="mw6A"><a href="./Johannes_Fatio" id="mw6Q" rel="mw:WikiLink" title="Johannes Fatio">Johannes Fatio</a></b> performed the first successful separation of <a href="./Conjoined_twins" id="mw6g" rel="mw:WikiLink" title="Conjoined twins">conjoined twins</a> in 1689?