REMS	radiofrequency ultrasound spectrometry
BMD	bone mineral density
MBD	Metabolic bone disease
VLBW	very low birth weight
ELBW	extremely low birth weight
IUGR	uterine growth restriction
BPD	bronchopulmonary dysplasia
NEC	necrotizing enterocolitis
TPN	total parenteral nutrition
PTH	parathyroid hormone
PTHrP	Parathyroid hormone-related protein
BMP	bone morphogenetic protein
EDCs	endocrine disruptors
PAX1	paired box l
RANKL	uclear factor-kappaB activating receptor
OPG	osteoprotegerin
FGF23	fibroblast growth factor 23
TNAP	issue nonspecific alkaline phosphatase
ENPP	ectonucleotide pyrophosphatase
ANK	ankylosis
CaSR	calcium-sensitive receptors
ALPL	alkaline phosphatase
GH/IGF-1	growth hormone/insulin-like growth factor 1
NO	nitric oxide
NADPH	nicotinamide adenine dinucleotide phosphate oxidase
OS	oxidative stress
EI	endocrine disruptors
TRP	tubular reabsorption of phosphorus
OC	osteocalcin
DEXA	dual anergy X-ray absorptiometry
QUS	quantitative ultra sound
SOS	speed of sound
BTT	bone transmission time
RLT	locomotor reflex therapy