1. Department of Orofacial Pain and Dysfunction, Academic Centre for Dentistry Amsterdam, University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
2. Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Centre, Academic Medical Center (AMC), and Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
3. Department of Pulmonary Diseases, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
4. Groningen Research Institute for Asthma and COPD, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
5. Department of General Practice and Elderly Care Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
6. Department of Pathology and Medical Biology, University Medical Center Groningen, Groningen, The Netherlands
7. Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, Groningen, The Netherlands
8. Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
9. Department of Oral and Maxillofacial Surgery, Tjongerschans Hospital, Heerenveen, The Netherlands
10. Center for Home Mechanical Ventilation, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands