00430nam a2200121Ia 4500008004100000245011400041260003900155260000900194300000700203650002600210650001200236856006000248170516s9999    xx            000 0 und d 2aA comparative study of collimation in bedside chest radiography for preterm infants in two teaching hospitals  bEuropean Journal of Radiology Open  c2015  a2:  xRadiologic Technology  xRadtech  uhttp://www.sciencedirect.com/science/journal/23520477/2