DAO	Diamine Oxidase;
FFQ	Food Frequency Questionnaire;
PCR	Polymerase Chain Reaction;
EDTA	Ethylenediaminetetraacetic acid;
BP	Blood Pressure;
GIQLI	Gastrointestinal Quality of Life Index;
MIDAS	Migraine Disability Assessment Scale;
HIT-6	Headache Impact Test;
RQLQ	Rhinoconjunctivitis Quality of Life Questionnaire;
SNOT-22	Nasosinusual Symptoms Questionnaire;
SCORAD	SCORing Atopic Dermatitis;
ISS	Itch Severity Scale;
QoLIAD	Quality of Life Index for Atopic Dermatitis;
DLQI	Dermatology Life Quality Index;
LC-ESI-MS/MS	Liquid Chromatography-Electrospray Ionization-Tandem Mass Spectrometry;
HPLC-TOF-MS	High-Performance Liquid Chromatography-Time-of-Flight Mass Spectrometry;
MAIT	Metabolite Automatic Identification Toolkit
PLS-DA	Partial Least Squares Discriminant Analysis