title: Letter: Storage and transport of serum for prolactin radioimmunoassay.
mesh_terms: D001793:Blood Preservation; D006801:Humans; D011177:Postal Service; D011388:Prolactin / Q000097:blood*; D011863:Radioimmunoassay; D013048:Specimen Handling; D013696:Temperature; D013997:Time Factors
chemical_list: D011388:Prolactin