Impact of Chest Radiography for Children with Lower Respiratory Tract Infection: A Propensity Score Approach. - Ecochard-Dugelay, Emmanuelle; Beliah, Muriel; Boisson, Caroline; Perreaux, Francis; de Laveaucoupet, Jocelyne; Labrune, Philippe; Epaud, Ralph; Ducou-Lepointe, Hubert; Bouyer, Jean; Gajdos, Vincent (PLoS ONE, 2014)