Parainfluenza 1-4 by RT-PCR Paroxysmal Nocturnal Hemoglobinuria, High Sensitivity, RBC PDGFRB FISH for Gleevec Eligibility in Myelodysplastic Syndrome/Myeloproliferative Disease (MDS/MPD) Paroxysmal Nocturnal Hemoglobinuria, High Sensitivity, WBC PD-L1 22C3 pharmDx by Immunohistochemistry with Interpretation, pembrolizumab (KEYTRUDA) Partial Thromboplastin Time PD-L1 28-8 pharmDx by Immunohistochemistry with Interpretation, nivolumab (OPDIVO) Parvovirus B 19 Antibody, IgM PD-L1 by Immunohistochemistry Parvovirus B19 Antibodies, IgG and IgM Pemphigoid Antibody Panel – Epithelial Basement Membrane Zone Antibodies, IgG and IgA, BP180 and BP230 Antibodies, IgG Parvovirus B19 Antibody, IgG Pemphigus Antibody Panel – Epithelial Cell Surface Antibodies and Desmoglein 1 and Desmoglein 3 Antibodies, IgG Parvovirus B19 by PCR Pentazocine Quantitation, Serum or Plasma Parvovirus B19 by Quantitative PCR Pentobarbital, Serum or Plasma Parvovirus B19, by PCR, Bone Marrow Perampanel Quantitative, Serum or Plasma PAX2 by Immunohistochemistry