1 Centre of Interstitial Lung Diseases, Nieuwegein, The Netherlands. Electronic address: [email protected].
2 Department of Pulmonology, St. Antonius Hospital, Nieuwegein, The Netherlands.
3 Centre of Interstitial Lung Diseases, Nieuwegein, The Netherlands; Division of Heart and Lungs, University Medical Centre, Utrecht, Nieuwegein, The Netherlands.