1 Department of Medicine, University of California, San Francisco, California. Electronic address: alexis.beatty@ucsf.edu.
2 Duke Clinical Research Institute, Duke University Medical Center, Durham, North Carolina.
3 Division of Cardiovascular Medicine, Department of Medicine, University of California, Davis, California.
4 Department of Medicine, University of California, San Francisco, California; Veterans Affairs Medical Center, San Francisco, California; Department of Epidemiology and Biostatistics, University of California, San Francisco, California.