Impact of preterm birth on infant mortality for newborns with congenital heart defects: The EPICARD population-based cohort study gan Enora Laas, Nathalie Lelong, Pierre-Yves Ancel, Damien Bonnet, Lucile Houyel, Jean-François Magny, Thibaut Andrieu, François Goffinet, Babak Khoshnood, on behalf of the EPICARD study group

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