1. Department of Pulmonary Medicine; Zuyderland Hospital; Henri Dunantstraat 5 6419 PC Heerlen The Netherlands
2. Department of Pulmonary Medicine; Academic Medical Center; Meibergdreef 9 1105 AZ Amsterdam The Netherlands
3. Department of Hematology; Academic Medical Center; Meibergdreef 9 1105 AZ Amsterdam The Netherlands