1 Department of Anesthesiology and Perioperative Medicine, University of California Los Angeles, Los Angeles, CA, USA. Electronic address: [email protected].
2 Department of Anesthesiology and Pain Medicine, University of Washington, Seattle, WA, USA.
3 Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA.
4 Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA; Department of Medicine, Division of Biomedical Informatics, University of California San Diego, CA, USA.