@misc{8822,
  author = {R. Charlton and A. Pierini and K. Klungsoyr and A. Neville and S. Jordan and L. van den Berg and D. Thayer and H. Bos and A. Puccini and A. Hansen and R. Gini and A. Engeland and A. Andersen and H. Dolk and E. Garne},
  title = {Asthma medication prescribing before, during and after pregnancy: a study in seven European regions},
  year = {2016},
  journal = {BMJ Open},
  volume = {6},
  number = {1},
  pages = {e009237},
  issn = {2044-6055},
  doi = {10.1136/bmjopen-2015-009237},
}