How independent are those independent studies?
Brandstatter
Robert
R
D003188:Composite Resins / Q000592:standards; D003723:Dental Amalgam / Q000592:standards; D003764:Dental Materials / Q000592:standards; D018865:Dental Research / Q000941:ethics*; D003793:Dental Restoration, Permanent / Q000592:standards; D030881:Disclosure / Q000941:ethics; D006801:Humans
D003188:Composite Resins; D003764:Dental Materials; D003723:Dental Amalgam