00624nas a2200241   4500000000100000008004100001260000600042100002300048700002700071700002100098700001900119700002000138700001500158700001400173700001400187700001500201700001700216700001400233245010000247300001400347490000700361022001400368       2012                            d  c71 aJ. Wójkowska-Mach1 aM. Borszewska-Kornacka1 aJoanna Domańska1 aJ. Gadzinowski1 aE. Gułczyńska1 aE. Helwich1 aA. Kordek1 aD. Pawlik1 aJ. Szczapa1 aJerzy Klamka1 aP. Heczko00aEarly-onset Infections of Very-low-birth-weight Infants in Polish Neonatal Intensive Care Units  a691–6950 v31  a0891-3668