| http://www.w3.org/ns/prov#value | - That coalesced into a field.??? During this period, many advances were made: pacemakers, knee replacements, kidney dialysis, breast implants, stents (shown), heart valve replacements??? At the same time, new materials such as silicone, Teflon, hydrogels and bioglass were explored for how they might be used in medicine.
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