@inproceedings{EbrahimiEtal16,
  author    = {Javid Ebrahimi and NhatHai Phan and Dejing Dou and Brigitte Piniewski and David Kil},
  title     = "{Characterizing Physical Activity in a Health Social Network}",
  booktitle   = {Proceedings of the 6th ACM International Conference on Digital Health},
  pages     = {123-129},
  year      = {2016},
}