1 Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, MN.
2 Departments of Epidemiology and Biostatistics and Pediatrics and Human Development, College of Human Medicine, Michigan State University, East Lansing, MI.
3 Department of Quantitative Health Sciences, Mayo Clinic, Jacksonville, FL.
4 Departments of Cardiovascular Medicine and Human Research Protection Program, Mayo Clinic, Rochester, MN.
5 Department of Cardiovascular Medicine, Mayo Clinic, Jacksonville, FL.
6 Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, MN. Electronic address: joyner.michael@mayo.edu.