Impact of chest radiography for children with lower respiratory tract infection: a propensity score approach. oleh Emmanuelle Ecochard-Dugelay, Muriel Beliah, Caroline Boisson, Francis Perreaux, Jocelyne de Laveaucoupet, Philippe Labrune, Ralph Epaud, Hubert Ducou-Lepointe, Jean Bouyer, Vincent Gajdos