[1]Department of Anesthesiology;
University Hospital Ulm;
D-89081 Ulm;
Germany;
[2]Klinik für Operative Intensivmedizin und Intermediate Care;
Uniklinik RWTH Aachen;
D-52074 Aachen;
Germany;
[3]Department of Anesthesia and Intensive Care;
Klinikum Mittelbaden Baden-Baden/Bühl;
D-76532 Baden-Baden;
Germany;
Budgets; Critical care; Economics; Humans; Intensive care units; Personnel hospital; Personnel staffing and scheduling; Physicians; Workload; Quality of health care;