Yesterday's future: the gap between where we are now and where we were supposed to be.
Norberto G
NG
De Vega
D058385:Cardiac Valve Annuloplasty / Q000592:standards / Q000639:trends*; D006350:Heart Valve Prosthesis / Q000592:standards / Q000639:trends*; D019918:Heart Valve Prosthesis Implantation / Q000592:standards / Q000639:trends*; D006801:Humans