Plasma vitamin D levels at birth and immune status of preterm infants
Keywords: ALRI; acute lower respiratory infection; BPD; bronchopulmonary dysplasia; CBMC; cord blood mononuclear cell; CTLA-4; cytotoxic T lymphocyte antigen 4; DC; dendritic cell; EOS; early-onset neonatal sepsis; HDM; house dust mite; IFN-a; interferon alpha; IFN