NARCOLEPSY ASSOCIATED ANTIGEN, BLOOD

NATURAL KILLER CELL ASSAY, BLOOD

NBT (NITRO-BLUE TETRAZOLIUM)

NEEDLESTICK BATTERY

NEISSERIA GONORRHOEAE AMPLIFIED DNA PROBE

NEISSERIA GONORRHOEAE CULTURE

NEISSERIA GONORRHOEAE/CHLAMYDIA TRACHOMATIS AMPLIFIED DNA PROBE

NEISSERIA MENINGITIDIS ANTIGEN

NEOPTERIN PROFILE

NETILMICIN, PLASMA, SERUM, OR SPINAL FLUID

NEURON-SPECIFIC ENOLASE (NSE), SPINAL FLUID

NEURONTIN

NEUROTRANSMITTER METABOLITES, SPINAL FLUID (5HIAA, HVA, 30MD)

NEUTROPHIL CYTOPLASMIC ANTIBODY (ANCA), SERUM

NEUTROPHIL OXIDATIVE BURST

NICOTINE AND METABOLITES, SERUM

NICOTINE AND METABOLITES, URINE

NIEMANN-PICK TYPE C DECTECTION, FIBROBLASTS

NITROBLUE TETRAZOLIUM

NITROGEN, TOTAL, FECAL BATTERY

NITROGEN, TOTAL, URINE

NOMID (CIAS1)

NON ESTERIFIED FATTY ACIDS (NEFA)

NOREPINEPHRINE, PLASMA

NORPACE

NORPRAMIN

NORTRIPTYLINE, BLOOD

NPM1

NTBC (ORFADIN)

NTX-TELOPEPTIDE, URINE

NUCLEOPHOSMIN (NPM1) GENE MUTATION DETECTION