1 Department of Research and Education, CIRO+, Center of Expertise for Chronic Organ Failure, 6085 NM Horn, Netherlands; Department of Respiratory Medicine, Maastricht University Medical Centre, Maastricht, Netherlands; NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht, Netherlands; REVAL-Rehabilitation Research Center, BIOMED-Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Diepenbeek, Belgium. Electronic address: martijnspruit@ciro-horn.nl.
2 Department of Medical Psychology and Department of Respiratory Disease, Radboud University Nijmegen Medical Center, Nijmegen, Netherlands.
3 Department of Medical Psychology, Academic Medical Center, University of Amsterdam, Amsterdam, Netherlands.
4 Department of Research and Education, CIRO+, Center of Expertise for Chronic Organ Failure, 6085 NM Horn, Netherlands; Department of Respiratory Medicine, Maastricht University Medical Centre, Maastricht, Netherlands.