title: The effect of storage pH on the precipitation of proteins in deep frozen urine samples.
mesh_terms: D011232:Chemical Precipitation; D004797:Enzyme-Linked Immunosorbent Assay; D005615:Freezing; D006801:Humans; D006863:Hydrogen-Ion Concentration; D011507:Proteinuria / Q000652:urine*; D013048:Specimen Handling / Q000379:methods*