1. Institute of Rheumatology, Tel Aviv Sourasky Medical Center and Sackler Faculty of Medicine, 6 Weizman Street, 64239 Tel Aviv, Israel
2. Department of Internal Medicine I, Klinikum Saarbrücken, 66119 Saarbrücken, Germany
3. Department of Psychosomatic Medicine, Technische Universität München, 81675 München, Germany
4. Ben Gurion University, Department of Medicine H, Soroka Medical Center and Faculty of Health Sciences, 84101 Beer Sheva, Israel