TY - JOUR A1 - Lasswell, S.M. A1 - Barfield, W.D. A1 - Rochat, R.W. A1 - Blackmon, L. T1 - Perinatal regionalization for very low-birth-weight and very preterm infants: A meta-analysis Y1 - 2010 DO - 10.1001/jama.2010.1226 VL - 304 IS - 9 ER -