Affiliation: | 1. Department of Occupational and Social Medicine, University of G?ttingen, Waldweg 37 B, D-37073, G?ttingen, Germany 2. Division of Anaesthesiology, Geneva University Hospitals and Medical Faculty, Geneva University, CH-1211, Geneva, Switzerland 3. Pain Research, Nuffield Department of Anaesthetics, University of Oxford, Level 6 West Wing, John Radcliffe Hospital, Headington, Oxford, OX3 9DU, UK
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