1 Department of Pulmonary Diseases, GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, Netherlands.
2 Centre of Expertise for Palliative Care, Maastricht University Medical Centre+, Maastricht, Netherlands.
3 Department of Optimising Patient Care, School for Care Public Health Research Institute (CAPHRI), Maastricht University, Maastricht, Netherlands.