@article{JMLR:v17:15-177,
  author  = {Jenna Wiens and John Guttag and Eric Horvitz},
  title   = {Patient Risk Stratification with Time-Varying Parameters: A Multitask Learning Approach},
  journal = {Journal of Machine Learning Research},
  year    = {2016},
  volume  = {17},
  number  = {79},
  pages   = {1--23},
  url     = {http://jmlr.org/papers/v17/15-177.html}
}