PUBLISHED BY THE EUROPEAN RESPIRATORY SOCIETY CHIEF EDITOR Anita K. Simonds (London, UK) ERS STAFF Eddy Baker, Alice Bartlett, Matt Broadhead, Lee Dodd, Jonathan Hansen, Catherine Pumphrey, Elin Reeves, David Sadler, Claire Turner, Ben Watson © 2015 European Respiratory Society Cover image: Juanmonino, iStockphoto Design by Claire Turner, Lee Dodd, ERS Typeset by Techset Composition Ltd Printed by Latimer Trend Indexed by Merrall-Ross International Limited All material is copyright to the European Respiratory Society. It may not be reproduced in any way including electronically without the express permission of the society. CONTACT, PERMISSIONS AND SALES REQUESTS: European Respiratory Society, 442 Glossop Road, Sheffield, S10 2PX, UK Tel: +44 114 2672860 Fax: +44 114 2665064 e-mail: info@ersj.org.uk ISBN 978-1-84984-075-0