Prealbumin, Serum Procainamide and NAPA Pregabalin, Serum or Plasma Procalcitonin Pregabalin, Urine Procollagen I by Immunohistochemistry Pregnenolone by LC-MS/MS, Serum or Plasma Procollagen Type I Intact N-Terminal Propeptide Prekallikrein Factor, Activity Products of Conception, Ploidy by Flow Cytometry Prostate Specific Antigen, Free Percentage (Includes Free PSA and Total PSA) Protein Gene Product (PGP) 9.5 by Immunohistochemistry Prostate Specific Antigen, Total Protein S Free, Antigen Prostate Specific Antigen, Total – Medicare Screening Protein S, Free Antigen with Reflex to Protein S, Total Antigen Prostate Specific Antigen, Total with Reflex to Free PSA (Includes Free Percentage) Protein S, Functional Prostate Specific Antigen, Ultrasensitive Protein S, Total Antigen