Welcome Help Please log in to determine if you are eligible to purchase PT Programs. LIGAND ASSAY-GENERAL - K Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Analyte Challenges per Shipment Number of Shipments Alpha‑fetoprotein (AFP) 5 Three shipments per year CEA 3 Cortisol 5 Ferritin 3 Folate, serum 3 hCG, quantitative 5 Immunoglobulin E (IgE) 5 Prostate‑specific antigen (PSA) 2 Prostate‑specific antigen, complexed (cPSA) 2 Prostate‑specific antigen, free 2 Prostatic acid phosphatase (PAP) 3 T3, free (triiodothyronine, free) 5 T3, total (triiodothyronine, total) 5 T3 uptake and related tests 5 T4, free (thyroxine, free) 5 T4, total (thyroxine, total) 5 Thyroid‑stimulating hormone (TSH) 5 Vitamin B12 3 Program Information Five 5.0‑mL liquid serum specimens Shipping Schedule Shipment A: April 8 Shipment B: July 22 Shipment C: November 12 Guest Log in/Register Customers Who Bought This Item Also Bought PROSTATE-SPECIFIC ANTIGEN CVL VIEW DETAILS > LIGAND ASSAY-GENERAL, VALIDATED MATERIAL VIEW DETAILS > LIGAND ASSAY CVL VIEW DETAILS >