@misc{8856,
  author = {A. Sultan and J. West and M. Grainge and R. Riley and L. Tata and O. Stephansson and K. Fleming and C. Nelson-Piercy and J. Ludvigsson},
  title = {Development and validation of risk prediction model for venous thromboembolism in postpartum women: multinational cohort study},
  year = {2016},
  journal = {Bmj},
  volume = {355},
  pages = {i6253},
  issn = {0959-8138},
  doi = {10.1136/bmj.i6253},
}