@article{Phibbs2007,
author = {Phibbs, C.S. and Baker, L.C. and Caughey, A.B. and Danielsen, B. and Schmitt, S.K. and Phibbs, R.H.},
title= {Level and volume of neonatal intensive care and mortality in very-low-birth-weight infants},
year = {2007},
doi = {10.1056/NEJMsa065029},
volume = {356},
number = {21},
pages = {2165--2175},
}