Polyclonal Immunotactoid Glomerulopathy Associated with Monoclonal Gammopathy of IgM Type and Underlying Plasmacellular Disease: Successful Treatment with Rituximab Alone oleh Wolfgang Neukirchen, Anne Oesterling, Dirk Oliver Wennmann, Barbara Heitplatz, Peter Ritter, Hartmut Merz, Veit Busch