Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (2) Enzyme-Linked Immunosorbent Assay (ELISA) (6) (-) Enzyme Immunoassay (EIA) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (6) Headspace Gas Chromatography (GC) (6) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) (-) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Serum or Plasma (2) Urine (1) Test Area (-) Postmortem (1) (-) Therapeutics (2) Test Category Antiparkinsons (1) Dopamine Precursor (1) Therapeutics (1) Test Sub-Category Other (2) Parkinsons (1) Your search has returned no tests.