@misc{10370,
  author = {M. Frisher and H. Heatlie and S. Chapman and J. Bashford and J. Norwood},
  title = {Switching between metered dose inhalers (MDIs) and dry powder inhalers (DPIs) in airways disease: An analysis of agespecific rates using the general practice research database.},
  year = {1999},
  journal = {Journal of Applied Therapeutic Research},
  volume = {2},
  pages = {253-259},
}