DLH, D., Usman, A., Nataprawira, M., & Primadi, A. (2016). The prevalence of hyaline membrane disease and the value of shake test and lamellar body concentration in preterm infants. Paediatrica Indonesiana, 43(3), 77-81. https://doi.org/10.14238/pi43.3.2003.77-81