1. Antwerp University Hospital (UZA), Department of Thoracic Oncology, Drie Eikenstraat 655, Edegem 2650, Belgium
2. Antwerp University Hospital (UZA), Department of General Internal Medicine, Infectious Diseases and Tropical Medicine, Edegem 2650, Belgium
3. Antwerp University Hospital (UZA), Department of Intensive Care, Edegem 2650, Belgium
4. Antwerp University Hospital (UZA), Department of Geriatrics, Edegem 2650, Belgium