Affiliation: | 1. National Center for Spinal Disorders, Buda Health Center, Kiralyhago u. 1-3, Budapest, 1126, Hungary 2. School of Ph.D. Studies, Semmelweis University, Budapest, Hungary 3. Faculty of Health Sciences, Semmelweis University, Budapest, Hungary 4. Spine Center, Schulthess Clinic, Zurich, Switzerland
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