[BMJ Publishing Group Ltd and British Thoracic Society British Thoracic Society Winter Meeting 2018, QEII Centre, Broad Sanctuary, Westminster, London SW1P 3EE, 5 to 7 December 2018, Programme and Abstracts - ()] Optimising inhalers for optimal asthma control - P167 Flow rate dependency of delivered and fine particle dose (DD and FPD) of salmeterol/fluticasone easyhaler and seretide diskus with clinically relevant patient flow rates