1. Department of Anesthesiology Yale University School of Medicine New Haven CT USA
2. Clinics for Anesthesiology, Intensive Care and Pain Medicine University Hospital of Ruhr University Bergmannsheil Bochum Bochum Germany
3. Department of Therapeutic Radiology Yale University School of Medicine New Haven CT USA
4. Department of Medical Oncology, West German Cancer Center University Hospital Essen Essen Germany