Vanfleteren Lowie E G W, Spruit Martijn A, Franssen Frits M E
Dept of Research and Education, CIRO+, Horn, The Netherlands
Dept of Respiratory Medicine, Maastricht University Medical Hospital, Maastricht, The Netherlands.
Eur Respir J. 2017 Feb 8;49(2). doi: 10.1183/13993003.01696-2016. Print 2017 Feb.