1. Department of Intensive Care and Intermediate Care, University Hospital RWTH Aachen, 52074 Aachen, Germany
2. Department of Pneumology and Intensive Care Medicine, University Hospital RWTH Aachen, 52074 Aachen, Germany
3. RWTH Centralized Biomaterial Bank (RWTH cBMB) at the Institute of Pathology, University Hospital RWTH Aachen, 52074 Aachen, Germany