1 Department of Computer Science and Applied Math and Statistics, Whiting School of Engineering, Johns Hopkins University, Baltimore, MD, USA. ssaria@cs.jhu.edu.
2 Department of Health Policy and Management, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, MD, USA. ssaria@cs.jhu.edu.
3 Armstrong Institute for Patient Safety and Quality, Johns Hopkins School of Medicine, Johns Hopkins University, Baltimore, MD, USA. ssaria@cs.jhu.edu.