1. Department of Anesthesiology and Critical Care MedicineUniversity of the SaarlandD-66421HomburgGermany
2. Department of Pharmacology and ToxicologyUniversity of Arkansas for Medical ScienceLittle RockArkansasUSA
3. Neurosurgical Research LaboratoryUniversity of the SaarlandD-66421HomburgGermany
4. Department of PathologyUniversity Hospital ZürichZürichSwitzerland