title: Letter: Behavior of tracer molecules in cerebrospinal fluid.
mesh_terms: D000818:Animals; D004285:Dogs; D006801:Humans; D008970:Molecular Weight; D011849:Radioactive Tracers / Q000134:cerebrospinal fluid* / Q000378:metabolism; D011868:Radioisotopes / Q000134:cerebrospinal fluid*
chemical_list: D011849:Radioactive Tracers; D011868:Radioisotopes