title: Letter: concentration of protein solutions.
mesh_terms: D002556:Cerebrospinal Fluid Proteins / Q000302:isolation & purification; D004586:Electrophoresis; D005615:Freezing; D011506:Proteins / Q000302:isolation & purification*; D011507:Proteinuria; D013696:Temperature
chemical_list: D002556:Cerebrospinal Fluid Proteins; D011506:Proteins