. Author manuscript; available in PMC: 2014 Dec 1.
Published in final edited form as: J Cyst Fibros. 2013 Feb 12;12(6):10.1016/j.jcf.2013.01.006. doi: 10.1016/j.jcf.2013.01.006
© 2012 European Cystic Fibrosis Society. Published by Elsevier B.V. All rights reserved.