Turner, Steve WRichardson, KathrynBurden, AnnieThomas, MikeMurray, ClarePrice, David2015-08-102015-08-102015Turner, S W, Richardson, K, Burden, A, Thomas, M, Murray, C & Price, D 2015, 'Initial step-up treatment changes in asthmatic children already prescribed inhaled corticosteroids : a historical cohort study', npj Primary Care Respiratory Medicine, vol. 25, 15041. https://doi.org/10.1038/npjpcrm.2015.41http://hdl.handle.net/2164/4801Acknowledgements The CPRD data was made available through an unrestricted grant to GPRD from the Medical Research Council. We are grateful to Research in Real Life for donating the OPCRD data and the Respiratory Effectiveness Group for funding the analysis.741328engRJ PediatricsRJJournal article10.1038/npjpcrm.2015.4125