Preference issue has many sides: cardiologist.
D006348:Cardiac Surgical Procedures / Q000295:instrumentation; D003258:Consumer Behavior; D032982:Contracts; D003659:Decision Making, Organizational; D018578:Hospital-Physician Relations; D006801:Humans; D008505:Medical Staff, Hospital; D017060:Patient Satisfaction; D011682:Purchasing, Hospital / Q000191:economics / Q000592:standards; D013523:Surgical Equipment / Q000191:economics / Q000592:standards; D014481:United States