The interhospital transfer network for very low birth weight infants in the United StatesMunik Shrestha, Samuel V. Scarpino, Erika M. Edwards, Lucy T. Greenberg and Jeffrey D. HorbarEPJ Data Sci., 7 1 (2018) 27DOI: https://doi.org/10.1140/epjds/s13688-018-0155-7