Acylcarnitines	AC
Amino Acids	AA
Anti-Dense Fine Speckled 70	Anti-DFS70
Area Under the Curve	AUC
Artificial Neural Networks	ANNs
Basal Ganglia	BG
Bladder Pain Syndrome	BPS
Capillary Electrophoresis	CE
Central Sensitization Syndrome	CSS
Cerebrospinal Fluid	CSF
Chronic Daily Headache	CDH
Chronic Fatigue Syndrome	CFS
Chronic Low Back Pain	CLBP
Chronic Prostatitis	CP
Cluster Headache	CH
Complex Regional Pain Syndrome	CRPS
Constipation Based Irritable Bowel Syndrome	IBS-C
Diarrhea Based Irritable Bowel Syndrome	IBS-D
Electrospray Ionization	ESI
Etiocholan-3α-ol-17-one Sulfate	Etio-S
Fibromyalgia	FM
Follicular Fluid	FF
Fourier Transform-Infrared Spectroscopy	FT-IR
Free Fatty Acids	FFA
Gas Chromatography	GC
High Resolution Mass Spectrometry	HRMS
High-Performance Liquid Chromatography	HPLC
Insulin resistance	IR
Interstitial Cystitis	IC
Irritable Bowel Syndrome	IBS
Irritable Bowel Syndrome Mice treated with C. butyricum	IBS+
Liquid Chromatography-Mass Spectrometry	LC-MS
Mass spectrometry	MS
Matrix-Assisted Laser Desorption/Ionization	MALDI
Mid-Infrared Microspectroscopy	IMS
Mitochondrial DNA	mtDNA
Multiple Chemical Sensitivity	MCS
Multivariate Analysis	MVA
Myofascial Pain Syndrome	MPS
Nonbacterial Prostatitis	NBP
Nuclear Magnetic Resonance Spectroscopy	NMR
Osteoarthritis	OA
Painful Bladder Syndrome	PBS
Peripheral Blood Mononuclear Cells	PBMCs
Peritoneal Fluid	PF
Phenylacetylglutamine	PAGN
Polycystic Ovarian Syndrome	PCOS
Post-Traumatic Stress Disorder	PTSD
Principal Component Analysis	PCA
Proton Nuclear Magnetic Resonance Spectroscopy	1H-NMR
Quadrupole	Q
Rheumatoid Arthritis	RA
Sequential Window Acquisition of all Theoretical fragment-ion spectra	SWATHTM
Soft Independent Modeling of Class Analogy	SIMCA
Support Vector Machines	SVM
Systemic Lupus Erythematosus	SLE
Tandem Mass Spectrometry	MS/MS
Temporomandibular Disorders	TMD
Tension-Type Headache	TTH
Thin Layer Chromatography	TLC
Time OF Flight/Mass Spectrometry	TOF/MS
Ultra High Performance Liquid Chromatography	UHPLC
Ultra-Performance Liquid Chromatography	UPLC
Volatile Organic Metabolites	VOMs