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Updated: Aug 10, 2026

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Hydrogel Nanoparticle Harvesting of Plasma or Urine for Detecting Low Abundance Proteins
Published on: August 7, 2014
The immunological integrity of matrix substance A and its possible detection and quantitation in urine
British Journal of Urology
|October 1, 1975
Abstract:
There would seem to be no doubt that most stone-forming patients at some time during the course of their disorder excrete substances not present in normal urine. However, considerable doubt must now exist that "Matrix Substance A" is a single antigenic entity or that its presence is confined to the active formation of renal calculi.

