1. From the Department of Oral and Maxillofacial Diseases (A.S., T.T., T.S., P.J.P.), Transplantation Laboratory, Medicum (E.V., M.-L.L.), Institute for Molecular Medicine Finland (M.P.), Immunobiology Research Program, Research Programs Unit (S.M.), and Department of Bacteriology and Immunology, Haartman Institute (S.M.), University of Helsinki, Finland; Department of Oral and Maxillofacial Diseases, Helsinki University Hospital, Finland (A.S., T.T., T.S., P.J.P.); Division of Periodontology,...