Lobbamrung K, Daramas T, Wittayasooporn J. The Effect of Oropharyngeal Colostrum Administration on Immunoglobulin A in Preterm Infants. Nurs Res Inno J [internet]. 2019 Apr. 17 [cited 2026 Sep. 30];25(1):16-28. available from: https://he02.tci-thaijo.org/index.php/RNJ/article/view/122435