@misc{9129,
  author = {C. Christiansen and V. Ehrenstein and U. Heide-J\orgensen and S. Skovbo and H. N\orrelund and H. Sorensen and L. Li and S. Jick},
  title = {Metformin initiation and renal impairment: a cohort study in Denmark and the UK},
  year = {2015},
  journal = {BMJ Open},
  volume = {5},
  number = {9},
  pages = {e008531},
  issn = {2044-6055},
  doi = {10.1136/bmjopen-2015-008531},
}