@article{bai-horng_2014,  title={Serial echocardiographic assessment of evolution of ductus arteriosus in preterm infants},  volume={12},  ISSN={1679-4508},  url={https://doi.org/10.1590/S1679-45082014CE3052},  DOI={10.1590/S1679-45082014CE3052},  number={1},  journal={einstein (São Paulo)},  publisher={Instituto Israelita de Ensino e Pesquisa Albert Einstein},  author={Bai-Horng, Su},  year={2014},  month={Jan},  pages={136–136} }