1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA.
2Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA.
3Department of Computer Science, Johns Hopkins University, Baltimore, MD, USA.
4Department of Biosystems Science and Engineering, ETH Zurich, Switzerland.
5Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA; Department of Electrical and Computer Engineering, Johns Hopkins University, Baltimore, MD, USA; Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, Baltimore, MD, USA. Electronic address: rsteven1@jh.edu.