Natural Killer Cell Panel (Inactive as of 11/14/16. Refer to 2013805 in the November Hot Line) Neuronal Nuclei (NeuN) by Immunohistochemistry Natural Killer Cells Enumeration Neutrophil Oxidative Burst Assay (DHR) Neisseria gonorrhoea Antibodies, Total Non-Invasive Prenatal Testing for Fetal Aneuploidy with 22q11.2 Microdeletion (Panorama) Niacin (Vitamin B3) Non-Invasive Prenatal Testing for RhD Genotyping, Fetal Nickel, Serum Noonan Spectrum Disorders Panel, Sequencing, 15 Genes Nickel, Urine Noonan Spectrum Disorders Panel, Sequencing, 15 Genes, Fetal Nicotine and Metabolites, Serum or Plasma, Quantitative Noonan Syndrome (PTPN11) Sequencing Nicotine and Metabolites, Urine, Quantitative Noonan Syndrome (PTPN11) Sequencing with Reflex to (SOS1) Sequencing Niemann-Pick, Type A (SMPD1) 4 Mutations Noonan Syndrome (SOS1) Sequencing Nitrogen, Total, Urine Norovirus Group 1 and 2 by PCR