| PUSE | Pumpkin Seed, IgE, Serum Mayo Clinic Laboratories in Rochester | 
      
        | PUPYP | Purines and Pyrimidines Panel, Plasma Mayo Clinic Laboratories in Rochester | 
      
        | PUPYU | Purines and Pyrimidines Panel, Random, Urine Mayo Clinic Laboratories in Rochester | 
      
        | PC1TS | Purkinje Cell Cytoplasmic Antibody Type 1 (PCA-1) Titer, Serum Mayo Clinic Laboratories in Rochester | 
      
        | PC1TC | Purkinje Cell Cytoplasmic Antibody Type 1 (PCA-1) Titer, Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | PC2TS | Purkinje Cell Cytoplasmic Antibody Type 2 (PCA-2) Titer, Serum Mayo Clinic Laboratories in Rochester | 
      
        | PC2TC | Purkinje Cell Cytoplasmic Antibody Type 2 (PCA-2) Titer, Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | PCTTS | Purkinje Cell Cytoplasmic Antibody Type Tr (PCA-Tr) Titer, Serum Mayo Clinic Laboratories in Rochester | 
      
        | PCTTC | Purkinje Cell Cytoplasmic Antibody, Type Tr (PCA-Tr) Titer, Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | FPYRE | Pyrethrum IgE Eurofins Viracor | 
      
        | FPD5C | Pyridoxal 5-phosphate (CSF) Medical Neurogenetics, LLC | 
      
        | PLP | Pyridoxal 5-Phosphate, Plasma Mayo Clinic Laboratories in Rochester | 
      
        | B6PA | Pyridoxic Acid, Plasma Mayo Clinic Laboratories in Rochester | 
      
        | P5NT | Pyrimidine 5' Nucleotidase, Blood Mayo Clinic Laboratories in Rochester | 
      
        | PKC | Pyruvate Kinase Enzyme Activity, Blood Mayo Clinic Laboratories in Rochester | 
      
        | PK1 | Pyruvate Kinase Enzyme Activity, Blood Mayo Clinic Laboratories in Rochester | 
      
        | PYRC | Pyruvate, Spinal Fluid Mayo Clinic Laboratories in Rochester | 
      
        | PYR | Pyruvic Acid, Blood Mayo Clinic Laboratories in Rochester |