Affiliation: | 1. Department of Medicine/inv?rtes medicin, Helsinki University Central Hospital, HUS, PO Box 700, FIN-00029, Helsinki, Finland 2. Department of Virology, Haartman Institute, PL 21 (Haartmaninkatu 3), University of Helsinki and Helsinki University Hospital Laboratory Division, Helsinki, FIN-00014, Finland 3. Department of Orthopedics and Traumatology, Helsinki University Central Hospital, PL 22 (Topeliuksenkatu 5), Helsinki, Finland 4. Department of Medicine/inv?rtes medicin, Helsinki University Central Hospital, ORTON Orthopedic Hospital of the ORTON Foundation, COXA Hospital for Joint Replacement, (Haartamaninkatu 8), HUS, PO Box 700, FIN-00029, Helsinki, Finland, Tampere, Finland
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