@misc{9496,
  author = {B. Cai and W. Xu and E. Bortnichak and D. Watson},
  title = {An algorithm to identify medical practices common to both the General Practice Research Database and The Health Improvement Network database},
  year = {2012},
  journal = {Pharmacoepidemiol Drug Saf},
  volume = {21},
  number = {7},
  pages = {770-774},
  issn = {1053-8569},
  doi = {10.1002/pds.3277},
}