BPD	Bronchopulmonary dysplasia
EOS	Early onset sepsis
EUGR	Extrauterine growth restriction
GA	Gestational age
IUGR	Intrauterine growth restriction
LOS	Late onset sepsis
MPO	myeloperoxidase
NAD	nicotinamide adenine dinucleotide
NMDA	N-methyl-D-aspartate
NEC	Necrotizing enterocolitis
NICU	Neonatal Intensive Care Unit
PMA	Postmenstrual Age
PN	Parenteral nutrition
ROP	Retinopathy of prematurity
SGA	Small for gestational age
VLBWI	Very Low Birth Weight Infants
PCA	Principal Component Analysis
PLS2C	PLS for classification
MCC	Matthews correlation coefficient
MCCcv	Matthews correlation coefficient calculated by cross-validation