. Author manuscript; available in PMC: 2015 May 28.
Published in final edited form as: J Cyst Fibros. 2007 Sep 4;7(2):137–141. doi: 10.1016/j.jcf.2007.07.002
© 2007 European Cystic Fibrosis Society. Published by Elsevier B.V. All rights reserved.