1. Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
2. Microsoft Research, Cambridge, Massachusetts 02143, USA
3. Center for Health Policy and Center for Primary Care and Outcomes Research, Stanford University, Stanford, California 94305, USA
4. Vector Institute, Toronto, Ontario M5G 1M1, Canada
5. Department of Technology, Culture, and Society, Tandon School of Engineering, New York University, Brooklyn, New York 11201, USA
6. Institute for Medical and Evaluative Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA