Reference limits for osteocalcin in infancy and early childhood : A longitudinal birth cohort study
OBJECTIVE: The longitudinal variations in serum levels of the hormone osteocalcin is largely unknown during infancy and early childhood. Our aim was to establish reference limits for total serum osteocalcin during specific time points from birth until 5 years of age and present those in the context of sex, breastfeeding practices and gestational age (GA).DESIGN: Blood samples from 551 Swedish chil