. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: J Cyst Fibros. 2014 Dec 11;14(3):370–375. doi: 10.1016/j.jcf.2014.11.005
© 2014 European Cystic Fibrosis Society. Published by Elsevier B.V. All rights reserved.