Association between cord blood 25-hydroxyvitamin D concentrations and respiratory tract infections in the first 6 months of age in a Korean population: a birth cohort study (COCOA).
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Shin YH, et al. Among authors: song dj.
Korean J Pediatr. 2013 Oct;56(10):439-45. doi: 10.3345/kjp.2013.56.10.439. Epub 2013 Oct 31.
Korean J Pediatr. 2013.
PMID: 24244212
Free PMC article.