Affiliation: | 1. Department of Anatomy, Institute of Basic Medical Sciences, Box 1105, Blindern, N-0317 Oslo, Norway 2. Institute of Oral Biology, University of Oslo, N-0317, Oslo, Norway 3. Institute of Pathology, Rikshospitalet University Hospital, N-0027, Norway 4. Institute of Immunology, Rikshospitalet University Hospital, N-0027, Norway
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