title: Effects of seasonality on blood ionized calcium in early neonatal periods.
abstract: The levels of whole blood ionized calcium were observed in 200 healthy neonates in the first week of life in spring and in summer. Levels of blood ionized calcium were lower in neonates born in spring compared to those of neonates born in summer. The levels of blood ionized calcium in adults did not change in different seasons. This study suggested that seasonality had a significant effect on blood ionized calcium in early neonatal life.
authors.affiliation: Department of Pediatrics, Affiliated Hospital, Guilin Medical College, Guilin, 541001, China.
authors.forename: M C
authors.initials: MC
authors.lastname: Zheng
authors.forename: L S
authors.initials: LS
authors.lastname: Zhou
authors.forename: G F
authors.initials: GF
authors.lastname: Zhang