title: Letter: Safety of weekly plasmapheresis.
mesh_terms: D001782:Blood Donors; D001797:Blood Protein Electrophoresis; D006801:Humans; D007136:Immunoglobulins / Q000032:analysis; D010956:Plasmapheresis; D013997:Time Factors; D005719:gamma-Globulins / Q000032:analysis
chemical_list: D007136:Immunoglobulins; D005719:gamma-Globulins