1. Special Clinic for FMS and CFS, Trier, Germany
2. The Feller Pharmacy, Fell, Germany
3. Department of Rheumatology, Aristotle University of Thessaloniki, AHEPA Hospital, Thessaloniki, Greece
4. Departments of Pharmacology and Experimental Therapeutics, Internal Medicine and Biochemistry, Tufts University School of Medicine, Tufts-New England Medical Center, USA