1 Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, United States of America; Department of General Anesthesiology, Cleveland Clinic, Cleveland, OH, United States of America.
2 Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, United States of America.
3 Department of Outcomes Research, Cleveland Clinic, Cleveland, OH, United States of America; Department of General Anesthesiology, Cleveland Clinic, Cleveland, OH, United States of America. Electronic address: TURANA@ccf.org.