John Kirklin
... that John Kirklin's modifications to Gibbon's heart–lung machine allowed blood-free surgery on the human heart?
... that <b id="mwB58"><a href="./John_W._Kirklin" id="mwB6A" rel="mw:WikiLink" title="John W. Kirklin">John Kirklin</a></b><span about="#mwt79" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"`s","href":"./Template:`s"},"params":{},"i":0}}]}' id="mwB6E" typeof="mw:Transclusion"><span typeof="mw:Entity">'</span>s</span> modifications to Gibbon's <a href="./Cardiopulmonary_bypass" id="mwB6I" rel="mw:WikiLink" title="Cardiopulmonary bypass">heart–lung machine</a> allowed blood-free surgery on the human heart?